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Talk:Dirac comb

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than point to the article you mentioned. And there isn't an immediate analogue with the Dirac delta function as that can be treated as equivalent to a probability distribution in it own right, whereas a Dirac comb cannot ... because it integrates to infinity and so is not equivalent to a probability distribution.
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It would help if the article gave a proper indication of the supposed relationship to Directional statistics.... there was nothing at all there before this latest edit. It would be good at least to have a section headed "use in directional statistics", or some such thing, even if it does little more
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one presumes is the Dirac delta function, but this is not a page in the middle of text on signal processing, rather a standalone page that should, in manner of such pages introduce terms as needed, not assume understanding. Of course I know the challenge is always where to draw the line and some
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Is the "scaling property" mentioned somewhere in the literature? I don't see the point of mentioning it here or how it can be of immediate used, even if it appears to be correct. In fact, they way it is presented now does not even mention the Dirac comb function explicitly. A more interesting
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Should the article say something about what Bracewell calls the "bed of nails" function? This and its natural higher-dimensional analogs are very important in crystallography. It's surprising that, as far as I can tell, Knowledge lacks an article on them.
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Directional (or wrapped, or circular) probability distributions are never integrated over the real number line (from negative infinity to positive infinity), they are always integrated over the unit circle (an interval of length 2π), as explained in the
3807:. The links in this article to circular statistics articles are constantly being removed because the relationship is not clear to some editors from reading this article. I have added some information in the intro, but any other ideas would be welcome. 3855:
article. Since all wrapped distributions are periodic with period 2π the limits of integration are irrelevant as long as the length of the interval is 2π. As a result, the Dirac comb of course integrates to unity. In linear statistics, the variable
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OK, I agree that the shah symbol may appear somewhat shaky through the pseudo-latex renderer, even though it may be possible to make the wiki-guys to implement a proper shah symbol. Why not stick to
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often extends from -infinity to infinity. In directional statistics, the angle is in some interval of length 2π In other words the angles θ and θ+2π are considered identical. The analog of
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with one of many edits by an editor who often thinks he's making the article better and isn't. Undoing his "improvements" over the project's scope would be a full-time job. The equation
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This seems to beg the question a bit, depending on what one means by the composition of δ with a smooth function. This identity is a trivial consequence of the usual definition (see
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and mainly call it the Dirac comb function? In principle, it doesn't matter much to me which notation and names are used as long as they can be motivated. If we are going to use
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obviously it is a periodic function with period 1/T (as it is a sum of evenly spaced delta functions, each 1/T apart in f-space). Next take the Fourier series of x(f) by the
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make sense, but as it was, is just incorrect. One quick look at the period of the the periodic function on the two sides of the equation would immediately reveal the error.
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First there was the probability nav box, which was removed. So I put back the nav box along with a short explanation. I will expand the explanation, and include the nav box.
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I am puzzled by the absence of any mention that the Fourier series of the Dirac comb can be expressed purely as a sum of cosine terms. This belongs in the article.
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to denote the Dirac comb function. If Bracewell is the base reference, why not stick to that symbol and why not call it the shah function, instead of using
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I changed the variables in this section, the left hand sides were given as a function of t and the right hand sides were given as a function of
2670:{\displaystyle c_{n}={\frac {1}{T}}\int _{f_{0}}^{f_{0}+1/T}\left(\sum _{k=-\infty }^{\infty }\delta (f-{\frac {k}{T}})\right)e^{-i2\pi nfT}df} 2013: 1234:{\displaystyle \quad {1 \over T}\sum _{k=-\infty }^{\infty }\delta \left(f-{k \over T}\right)\quad =\sum _{n=-\infty }^{\infty }e^{-i2\pi fnT}} 211: 106: 1306: 3803:
Can someone help here - The Dirac comb of period 2π is to circular statistics what the Dirac delta function is to linear statistics. E.g see
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Yes, I see it, but can you please tell me what information the "Scaling property" section of the article provides about the comb function? --
3903: 3193:{\displaystyle 1=\int _{-{\frac {1}{2T}}}^{\frac {1}{2T}}\delta (f)e^{-i2\pi nfT}df=\int _{-\infty }^{\infty }\delta (f)e^{-i2\pi nfT}df,} 1829: 2104: 3944: 4243: 3427: 2998: 202: 163: 97: 58: 3413:{\displaystyle \sum _{k=-\infty }^{\infty }F\left(\nu +{\frac {k}{T}}\right)=T\sum _{n=-\infty }^{\infty }f(nT)\ e^{-i2\pi nT\nu }} 2990:{\displaystyle \sum _{k=-\infty }^{\infty }\delta (f-{\frac {k}{T}})={\frac {1}{T}}\sum _{n=-\infty }^{\infty }e^{i2\pi nfT}} 3788: 3655: 958:
Bracewell isn't the only reference about the Dirac comb. Oppenheim and Schafer is an authorative reference and they call it
781:. This property is useful since it can simplify certain derivations, and we only need to remember the Fourier transform of 4247: 3633: 33: 1638: 3487: 1426: 3782: 3651: 3907: 21: 3948: 2005:
I found this very useful, but personally took me a little time to digest so want to clarify a little more.
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determined by the standard Fourier trick (of multiplying and then integrating orthogonal functions since
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I've replaced "III" with "\text{Ш}", which produces a slightly-smaller-size letter but otherwise works.
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and Dirac comb function, I would like to see a reference which establishes this notation and name. --
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is the Shah function or whether it needs T=1. Anyway, I created a redirect for Shah function to here.
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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on Knowledge. If you would like to participate, please visit the project page, where you can join
4224: 3828: 2361:{\displaystyle \int _{f_{0}}^{f_{0}+1/T}e^{i2\pi mfT}e^{-i2\pi nfT}df={\frac {1}{T}}\delta _{mn}} 1088: 194: 89: 2729: 811: 784: 757: 726: 73: 52: 3266: 1928: 4182: 4142: 4121: 4061: 3981: 3554: 3534: 1073: 991: 931: 911: 876: 3964: 3498: 2199: 966:). your "shah" function is just three letters: "I" and what we should really get is the 2804: 2776: 3763: 1282: 4202: 4162: 4101: 4081: 4041: 4021: 4001: 3514: 188: 4255: 3922: 3873: 3824: 3812: 340: 272: 3551:. Also, the (unitary) Fourier transform of the comb was incorrect. The period is 2492:{\displaystyle c_{n}={\frac {1}{T}}\int _{f_{0}}^{f_{0}+1/T}x(t)e^{-i2\pi nfT}df} 3256:{\displaystyle 1\ {\stackrel {\mathcal {F}}{\Longleftrightarrow }}\ \delta (f).} 1242: 1069: 1018:
The only way I've found to make the symbol is to use three upright 'I' letters:
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article which have the same symbol with subscript as the former symbol for the
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oh, and i forgot to mention that i looked up all of the articles linked to
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I restored the scaling property, expressed properly, with justification.
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Now this needs source or proof. Is it really a Schwartz distribution?
988:) and add Oppenheim and Schafer to the reference list? Where does the 4233: 4139:
level of assumed knowledge is inescapable (we're not going to define
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that is in the range we are integrating (-1/2T,1/2T) over is with
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Dirac_delta_function#Delta_function_of_more_complicated_arguments
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Shouldn't we inform readers that the imaginary terms cancel out?
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to differentiate it from the "nascent" impulse functions in the
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However, the hinting causes these 'I's to have odd spacing. --
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Then just write out the Poisson summation formula (row 602,
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The article refers to Bracewell and he uses the shah-symbol
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Relationship between functions and their Fourier Transforms
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knock yourself out. there is a mention of this scaling at
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is periodic over 1/T, we can choose a simple range with
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But 4146: 3719: 3714: 3360: 3355: 3301: 3296: 3136: 3131: 2957: 2952: 2895: 2890: 2598: 2593: 2142: 2137: 2051: 2046: 1867: 1862: 1754: 1749: 1667: 1645: 1344: 1339: 1198: 1193: 1140: 1135: 1035: 1032: 1029: 995: 935: 915: 816: 789: 762: 731: 684: 627: 622: 543: 538: 495: 490: 455: 372: 317:{\displaystyle \sum \delta (t-nT)} 267:This is the same as the so-called 14: 4267:Low-priority mathematics articles 3610:{\displaystyle {\sqrt {2\pi }}/T} 220:Knowledge:WikiProject Engineering 115:Knowledge:WikiProject Mathematics 4282:WikiProject Engineering articles 4272:Start-Class Engineering articles 4262:Start-Class mathematics articles 3959:Added "citation needed" tag. -- 1927:Then ask yourself: What is the 395:{\displaystyle \Delta _{T}(t)\ } 223:Template:WikiProject Engineering 187: 177: 156: 118:Template:WikiProject Mathematics 82: 72: 51: 20: 240:This article has been rated as 135:This article has been rated as 4229:04:11, 20 September 2016 (UTC) 3742: 3727: 3694: 3682: 3503:17:19, 16 September 2008 (UTC) 3455: 3449: 3440: 3434: 3377: 3368: 3247: 3241: 3222: 3150: 3144: 3083: 3077: 3015:Since you have no problem with 3007:07:44, 16 September 2008 (UTC) 2922: 2903: 2719:{\displaystyle e^{-i2\pi nfT}} 2625: 2606: 2452: 2446: 2117: 2111: 2078: 2059: 2026: 2020: 1842: 1836: 1777: 1762: 1719: 1713: 1559: 1553: 1319: 1313: 1051: 1045: 895: 889: 707: 693: 676: 668: 655: 635: 601: 593: 580: 577: 557: 551: 518: 503: 470: 464: 387: 381: 311: 296: 280:I think so - I don't know if 1: 3968:13:07, 26 December 2014 (UTC) 3953:12:17, 26 December 2014 (UTC) 3927:04:33, 27 December 2011 (UTC) 3912:03:59, 27 December 2011 (UTC) 3878:22:14, 25 November 2010 (UTC) 3833:15:12, 25 November 2010 (UTC) 3817:09:48, 18 November 2010 (UTC) 3793:17:06, 21 November 2009 (UTC) 3463: 3461: 2869:Therefore we have shown that 1174: 1109: 1093:00:31, 26 February 2020 (UTC) 214:and see a list of open tasks. 109:and see a list of open tasks. 3772:23:42, 28 October 2009 (UTC) 3638:19:37, 23 October 2013 (UTC) 2008:First look at the function: 4098:should be defined as well. 2766:{\displaystyle f_{0}=-1/2T} 828:{\displaystyle \Delta _{T}} 801:{\displaystyle \Delta _{1}} 774:{\displaystyle \Delta _{1}} 743:{\displaystyle \Delta _{T}} 344:15:41, 27 August 2005 (UTC) 332:21:27, 26 August 2005 (UTC) 276:20:23, 26 August 2005 (UTC) 4298: 2997:which is the desired eqn. 1013:22:36, 2 August 2006 (UTC) 975:21:05, 2 August 2006 (UTC) 953:21:00, 2 August 2006 (UTC) 864:21:02, 2 August 2006 (UTC) 854:20:59, 2 August 2006 (UTC) 840:21:02, 2 August 2006 (UTC) 835:easily can be derived. -- 246:project's importance scale 3488:Poisson summation formula 3424:explicitly for the case 1995:20:05, 12 June 2007 (UTC) 1246:18:52, 12 June 2007 (UTC) 1078:01:36, 10 June 2013 (UTC) 239: 172: 134: 67: 46: 4248:03:33, 7 July 2022 (UTC) 3660:14:41, 4 July 2009 (UTC) 1809:. You'll find that all 431:05:45, 8 June 2006 (UTC) 415:05:44, 8 June 2006 (UTC) 141:project's priority scale 4192:{\displaystyle \delta } 4152:{\displaystyle \Sigma } 4131:{\displaystyle \delta } 4071:{\displaystyle \delta } 3991:{\displaystyle \delta } 3575:{\displaystyle 2\pi /T} 3544:{\displaystyle \omega } 2773:, so the only value of 2196:where the coefficients 1261:) be periodic, so that 1001:{\displaystyle \Delta } 941:{\displaystyle \Delta } 921:{\displaystyle \Delta } 203:WikiProject Engineering 98:WikiProject Mathematics 4213: 4193: 4173: 4153: 4132: 4112: 4092: 4072: 4052: 4032: 4012: 3992: 3933:Schwartz distribution? 3799:Directional statistics 3752: 3723: 3669:It can be shown that 3611: 3576: 3545: 3525: 3478: 3414: 3364: 3305: 3257: 3194: 2991: 2961: 2899: 2861: 2821: 2795: 2767: 2720: 2671: 2602: 2493: 2362: 2217: 2186: 2146: 2085: 2055: 1976: 1910: 1871: 1786: 1758: 1676: 1609: 1459: 1397: 1348: 1235: 1202: 1144: 1058: 1008:symbol comes from? -- 1002: 942: 922: 902: 901:{\displaystyle III(t)} 829: 802: 775: 744: 714: 631: 547: 499: 396: 318: 28:This article is rated 4214: 4194: 4174: 4154: 4133: 4113: 4093: 4073: 4053: 4033: 4013: 3993: 3753: 3700: 3612: 3577: 3546: 3526: 3479: 3415: 3341: 3282: 3258: 3195: 2992: 2938: 2876: 2862: 2822: 2796: 2768: 2721: 2672: 2579: 2494: 2363: 2218: 2216:{\displaystyle c_{n}} 2187: 2123: 2086: 2032: 1977: 1911: 1848: 1787: 1735: 1677: 1610: 1460: 1398: 1325: 1236: 1179: 1121: 1059: 1003: 943: 923: 903: 830: 803: 776: 745: 715: 608: 524: 476: 397: 319: 4203: 4183: 4163: 4143: 4122: 4102: 4082: 4062: 4042: 4022: 4002: 3982: 3896:contributed long ago 3853:wrapped distribution 3805:wrapped distribution 3779:Dirac delta function 3676: 3586: 3555: 3535: 3515: 3428: 3279: 3210: 3025: 2873: 2831: 2805: 2777: 2730: 2685: 2505: 2374: 2227: 2200: 2105: 2014: 1935: 1830: 1707: 1639: 1489: 1427: 1307: 1106: 1024: 992: 932: 912: 877: 812: 785: 758: 754:Dirac comb function 727: 451: 404:Dirac delta function 368: 287: 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4200: 4181: 4180: 4161: 4160: 4141: 4140: 4120: 4119: 4100: 4099: 4080: 4079: 4060: 4059: 4040: 4039: 4020: 4019: 4000: 3999: 3980: 3979: 3976: 3935: 3888: 3801: 3783: 3764: 3674: 3673: 3667: 3647: 3619: 3584: 3583: 3553: 3552: 3533: 3532: 3513: 3512: 3426: 3425: 3382: 3313: 3309: 3277: 3276: 3208: 3207: 3153: 3086: 3063: 3047: 3023: 3022: 2962: 2871: 2870: 2834: 2829: 2828: 2803: 2802: 2775: 2774: 2733: 2728: 2727: 2688: 2683: 2682: 2633: 2578: 2574: 2548: 2536: 2508: 2503: 2502: 2455: 2417: 2405: 2377: 2372: 2371: 2345: 2298: 2273: 2247: 2235: 2225: 2224: 2203: 2198: 2197: 2157: 2147: 2103: 2102: 2012: 2011: 1992:207.190.198.135 1955: 1938: 1933: 1932: 1889: 1872: 1828: 1827: 1814: 1807: 1705: 1704: 1651: 1637: 1636: 1582: 1562: 1532: 1520: 1505: 1492: 1487: 1486: 1430: 1425: 1424: 1376: 1359: 1349: 1305: 1304: 1241:? Thank you. -- 1203: 1152: 1148: 1104: 1103: 1100: 1027: 1022: 1021: 990: 989: 930: 929: 910: 909: 875: 874: 871: 869:The shah symbol 815: 810: 809: 788: 783: 782: 761: 756: 755: 730: 725: 724: 683: 666: 591: 454: 449: 448: 441: 371: 366: 365: 359: 354: 285: 284: 265: 225: 222: 219: 216: 215: 193: 186: 166: 120: 117: 114: 111: 110: 88: 81: 61: 32:on Knowledge's 29: 12: 11: 5: 4295: 4293: 4285: 4284: 4279: 4274: 4269: 4264: 4254: 4253: 4235: 4232: 4208: 4188: 4168: 4148: 4127: 4107: 4087: 4067: 4047: 4038:defining only 4027: 4007: 3987: 3975: 3972: 3971: 3970: 3934: 3931: 3930: 3929: 3904:71.169.185.162 3887: 3884: 3883: 3882: 3881: 3880: 3845: 3844: 3843: 3842: 3836: 3835: 3800: 3797: 3796: 3795: 3784:Sławomir Biały 3765:Zitterbewegung 3759: 3758: 3747: 3744: 3741: 3738: 3735: 3732: 3729: 3726: 3721: 3716: 3713: 3710: 3707: 3703: 3699: 3696: 3693: 3690: 3687: 3684: 3681: 3666: 3663: 3652:Sławomir Biały 3646: 3643: 3606: 3602: 3596: 3593: 3571: 3567: 3563: 3560: 3540: 3520: 3460: 3457: 3454: 3451: 3448: 3445: 3442: 3439: 3436: 3433: 3423: 3421: 3420: 3407: 3404: 3401: 3398: 3395: 3392: 3389: 3385: 3379: 3376: 3373: 3370: 3367: 3362: 3357: 3354: 3351: 3348: 3344: 3340: 3337: 3333: 3327: 3324: 3319: 3316: 3312: 3308: 3303: 3298: 3295: 3292: 3289: 3285: 3252: 3249: 3246: 3243: 3240: 3230: 3224: 3215: 3201: 3200: 3189: 3186: 3183: 3178: 3175: 3172: 3169: 3166: 3163: 3160: 3156: 3152: 3149: 3146: 3143: 3138: 3133: 3130: 3126: 3122: 3119: 3116: 3111: 3108: 3105: 3102: 3099: 3096: 3093: 3089: 3085: 3082: 3079: 3076: 3069: 3066: 3062: 3053: 3050: 3046: 3041: 3037: 3033: 3030: 3014: 3012: 3011: 3010: 3009: 2984: 2981: 2978: 2975: 2972: 2969: 2965: 2959: 2954: 2951: 2948: 2945: 2941: 2935: 2932: 2927: 2924: 2919: 2916: 2911: 2908: 2905: 2902: 2897: 2892: 2889: 2886: 2883: 2879: 2867: 2854: 2851: 2846: 2841: 2837: 2816: 2813: 2810: 2790: 2786: 2782: 2762: 2759: 2755: 2751: 2748: 2745: 2740: 2736: 2713: 2710: 2707: 2704: 2701: 2698: 2695: 2691: 2679: 2678: 2677: 2666: 2663: 2658: 2655: 2652: 2649: 2646: 2643: 2640: 2636: 2631: 2627: 2622: 2619: 2614: 2611: 2608: 2605: 2600: 2595: 2592: 2589: 2586: 2582: 2577: 2571: 2567: 2563: 2560: 2555: 2551: 2543: 2539: 2534: 2528: 2525: 2520: 2515: 2511: 2500: 2488: 2485: 2480: 2477: 2474: 2471: 2468: 2465: 2462: 2458: 2454: 2451: 2448: 2445: 2440: 2436: 2432: 2429: 2424: 2420: 2412: 2408: 2403: 2397: 2394: 2389: 2384: 2380: 2355: 2352: 2348: 2342: 2339: 2334: 2331: 2328: 2323: 2320: 2317: 2314: 2311: 2308: 2305: 2301: 2295: 2292: 2289: 2286: 2283: 2280: 2276: 2270: 2266: 2262: 2259: 2254: 2250: 2242: 2238: 2233: 2210: 2206: 2194: 2193: 2192: 2179: 2176: 2173: 2170: 2167: 2164: 2160: 2154: 2150: 2144: 2139: 2136: 2133: 2130: 2126: 2122: 2119: 2116: 2113: 2110: 2093: 2092: 2091: 2080: 2075: 2072: 2067: 2064: 2061: 2058: 2053: 2048: 2045: 2042: 2039: 2035: 2031: 2028: 2025: 2022: 2019: 2006: 2000: 1999: 1998: 1997: 1986: 1985: 1984: 1983: 1967: 1962: 1958: 1954: 1951: 1948: 1945: 1941: 1922: 1921: 1920: 1919: 1918: 1917: 1901: 1896: 1892: 1888: 1885: 1882: 1879: 1875: 1869: 1864: 1861: 1858: 1855: 1851: 1847: 1844: 1841: 1838: 1835: 1820: 1819: 1818: 1817: 1812: 1805: 1802:and solve for 1797: 1796: 1795: 1794: 1793: 1792: 1779: 1776: 1773: 1770: 1767: 1764: 1761: 1756: 1751: 1748: 1745: 1742: 1738: 1732: 1729: 1724: 1721: 1718: 1715: 1712: 1697: 1696: 1695: 1694: 1688: 1687: 1686: 1685: 1684: 1683: 1669: 1666: 1663: 1658: 1654: 1650: 1647: 1644: 1629: 1628: 1627: 1626: 1620: 1619: 1618: 1617: 1616: 1615: 1602: 1599: 1594: 1589: 1585: 1581: 1578: 1575: 1572: 1569: 1565: 1561: 1558: 1555: 1552: 1547: 1544: 1539: 1535: 1527: 1523: 1518: 1512: 1508: 1504: 1499: 1495: 1479: 1478: 1477: 1476: 1470: 1469: 1468: 1467: 1466: 1465: 1450: 1447: 1442: 1437: 1433: 1417: 1416: 1415: 1414: 1408: 1407: 1406: 1405: 1404: 1403: 1388: 1383: 1379: 1375: 1372: 1369: 1366: 1362: 1356: 1352: 1346: 1341: 1338: 1335: 1332: 1328: 1324: 1321: 1318: 1315: 1312: 1297: 1296: 1295: 1294: 1283:Fourier series 1228: 1225: 1222: 1219: 1216: 1213: 1210: 1206: 1200: 1195: 1192: 1189: 1186: 1182: 1178: 1172: 1166: 1163: 1158: 1155: 1151: 1147: 1142: 1137: 1134: 1131: 1128: 1124: 1118: 1115: 1099: 1096: 1081: 1080: 1066: 1065: 1064: 1053: 1050: 1047: 1042: 1037: 1034: 1031: 997: 978: 977: 937: 917: 897: 894: 891: 888: 885: 882: 870: 867: 857: 856: 822: 818: 795: 791: 768: 764: 737: 733: 721: 720: 709: 706: 702: 698: 695: 690: 686: 678: 674: 670: 665: 660: 657: 654: 651: 648: 644: 640: 637: 634: 629: 624: 621: 618: 615: 611: 603: 599: 595: 590: 585: 582: 579: 576: 573: 570: 566: 562: 559: 556: 553: 550: 545: 540: 537: 534: 531: 527: 523: 520: 517: 514: 511: 508: 505: 502: 497: 492: 489: 486: 483: 479: 475: 472: 469: 466: 461: 457: 440: 437: 436: 435: 434: 433: 389: 386: 383: 378: 374: 357: 353: 350: 349: 348: 347: 346: 325: 324: 313: 310: 307: 304: 301: 298: 295: 292: 264: 261: 258: 257: 254: 253: 250: 249: 242:Low-importance 238: 232: 231: 229: 212:the discussion 199: 198: 182: 170: 169: 167:Low‑importance 161: 149: 148: 145: 144: 133: 127: 126: 124: 107:the discussion 94: 93: 77: 65: 64: 56: 44: 43: 37: 26: 13: 10: 9: 6: 4: 3: 2: 4294: 4283: 4280: 4278: 4275: 4273: 4270: 4268: 4265: 4263: 4260: 4259: 4257: 4250: 4249: 4245: 4241: 4231: 4230: 4226: 4222: 4206: 4186: 4166: 4125: 4105: 4085: 4065: 4045: 4025: 4005: 3985: 3973: 3969: 3965: 3962: 3958: 3957: 3956: 3954: 3950: 3946: 3942: 3932: 3928: 3924: 3920: 3916: 3915: 3914: 3913: 3909: 3905: 3901: 3897: 3893: 3885: 3879: 3875: 3871: 3867: 3863: 3859: 3854: 3849: 3848: 3847: 3846: 3840: 3839: 3838: 3837: 3834: 3830: 3826: 3821: 3820: 3819: 3818: 3814: 3810: 3806: 3798: 3794: 3790: 3786: 3780: 3776: 3775: 3774: 3773: 3770: 3769: 3767: 3745: 3739: 3736: 3733: 3730: 3724: 3711: 3708: 3705: 3701: 3697: 3691: 3688: 3685: 3679: 3672: 3671: 3670: 3664: 3662: 3661: 3657: 3653: 3645:Bed of nails? 3644: 3642: 3639: 3635: 3631: 3627: 3623: 3604: 3600: 3594: 3591: 3569: 3565: 3561: 3558: 3538: 3518: 3510: 3505: 3504: 3500: 3496: 3491: 3489: 3484: 3458: 3452: 3446: 3443: 3437: 3431: 3405: 3402: 3399: 3396: 3393: 3390: 3387: 3383: 3374: 3371: 3365: 3352: 3349: 3346: 3342: 3338: 3335: 3331: 3325: 3322: 3317: 3314: 3310: 3306: 3293: 3290: 3287: 3283: 3275: 3274: 3273: 3272: 3268: 3263: 3250: 3244: 3238: 3213: 3206: 3187: 3184: 3181: 3176: 3173: 3170: 3167: 3164: 3161: 3158: 3154: 3147: 3141: 3128: 3124: 3120: 3117: 3114: 3109: 3106: 3103: 3100: 3097: 3094: 3091: 3087: 3080: 3074: 3067: 3064: 3060: 3051: 3048: 3044: 3039: 3035: 3031: 3028: 3021: 3020: 3019: 3018: 3008: 3004: 3000: 2982: 2979: 2976: 2973: 2970: 2967: 2963: 2949: 2946: 2943: 2939: 2933: 2930: 2925: 2917: 2914: 2909: 2906: 2900: 2887: 2884: 2881: 2877: 2868: 2852: 2849: 2844: 2839: 2835: 2814: 2811: 2808: 2788: 2784: 2780: 2760: 2757: 2753: 2749: 2746: 2743: 2738: 2734: 2711: 2708: 2705: 2702: 2699: 2696: 2693: 2689: 2680: 2664: 2661: 2656: 2653: 2650: 2647: 2644: 2641: 2638: 2634: 2629: 2620: 2617: 2612: 2609: 2603: 2590: 2587: 2584: 2580: 2575: 2569: 2565: 2561: 2558: 2553: 2549: 2541: 2537: 2532: 2526: 2523: 2518: 2513: 2509: 2501: 2486: 2483: 2478: 2475: 2472: 2469: 2466: 2463: 2460: 2456: 2449: 2443: 2438: 2434: 2430: 2427: 2422: 2418: 2410: 2406: 2401: 2395: 2392: 2387: 2382: 2378: 2370: 2369: 2353: 2350: 2346: 2340: 2337: 2332: 2329: 2326: 2321: 2318: 2315: 2312: 2309: 2306: 2303: 2299: 2293: 2290: 2287: 2284: 2281: 2278: 2274: 2268: 2264: 2260: 2257: 2252: 2248: 2240: 2236: 2231: 2208: 2204: 2195: 2177: 2174: 2171: 2168: 2165: 2162: 2158: 2152: 2148: 2134: 2131: 2128: 2124: 2120: 2114: 2108: 2101: 2100: 2099:of the form: 2098: 2094: 2073: 2070: 2065: 2062: 2056: 2043: 2040: 2037: 2033: 2029: 2023: 2017: 2010: 2009: 2007: 2004: 2003: 2002: 2001: 1996: 1993: 1990: 1989: 1988: 1987: 1965: 1960: 1956: 1952: 1949: 1946: 1943: 1939: 1930: 1926: 1925: 1924: 1923: 1899: 1894: 1890: 1886: 1883: 1880: 1877: 1873: 1859: 1856: 1853: 1849: 1845: 1839: 1833: 1826: 1825: 1824: 1823: 1822: 1821: 1815: 1808: 1801: 1800: 1799: 1798: 1774: 1771: 1768: 1765: 1759: 1746: 1743: 1740: 1736: 1730: 1727: 1722: 1716: 1710: 1703: 1702: 1701: 1700: 1699: 1698: 1692: 1691: 1690: 1689: 1664: 1661: 1656: 1652: 1648: 1642: 1635: 1634: 1633: 1632: 1631: 1630: 1624: 1623: 1622: 1621: 1600: 1597: 1592: 1587: 1583: 1579: 1576: 1573: 1570: 1567: 1563: 1556: 1550: 1545: 1542: 1537: 1533: 1525: 1521: 1516: 1510: 1506: 1502: 1497: 1493: 1485: 1484: 1483: 1482: 1481: 1480: 1474: 1473: 1472: 1471: 1448: 1445: 1440: 1435: 1431: 1423: 1422: 1421: 1420: 1419: 1418: 1412: 1411: 1410: 1409: 1386: 1381: 1377: 1373: 1370: 1367: 1364: 1360: 1354: 1350: 1336: 1333: 1330: 1326: 1322: 1316: 1310: 1303: 1302: 1301: 1300: 1299: 1298: 1292: 1288: 1284: 1280: 1276: 1272: 1268: 1264: 1260: 1256: 1252: 1251: 1250: 1249: 1248: 1247: 1244: 1226: 1223: 1220: 1217: 1214: 1211: 1208: 1204: 1190: 1187: 1184: 1180: 1176: 1170: 1164: 1161: 1156: 1153: 1149: 1145: 1132: 1129: 1126: 1122: 1116: 1113: 1097: 1095: 1094: 1090: 1086: 1079: 1075: 1071: 1067: 1048: 1040: 1020: 1019: 1017: 1016: 1015: 1014: 1011: 987: 983: 976: 973: 969: 965: 961: 957: 956: 955: 954: 951: 892: 886: 883: 880: 868: 866: 865: 862: 855: 852: 848: 844: 843: 842: 841: 838: 820: 793: 766: 753: 735: 704: 700: 696: 688: 672: 663: 658: 652: 649: 646: 642: 638: 632: 619: 616: 613: 609: 597: 588: 583: 574: 571: 568: 564: 560: 554: 548: 535: 532: 529: 525: 521: 515: 512: 509: 506: 500: 487: 484: 481: 477: 473: 467: 459: 447: 446: 445: 438: 432: 429: 425: 421: 420: 419: 418: 417: 416: 413: 409: 405: 384: 376: 363: 351: 345: 342: 338: 337: 336: 335: 334: 333: 330: 308: 305: 302: 299: 293: 290: 283: 282: 281: 278: 277: 274: 270: 269:Shah function 263:Shah function 262: 247: 243: 237: 234: 233: 230: 213: 209: 205: 204: 196: 190: 185: 183: 180: 176: 175: 171: 165: 162: 159: 155: 142: 138: 132: 129: 128: 125: 108: 104: 100: 99: 91: 85: 80: 78: 75: 71: 70: 66: 60: 57: 54: 50: 45: 41: 35: 27: 23: 18: 17: 4237: 3977: 3945:92.52.10.154 3939:— Preceding 3936: 3899: 3889: 3865: 3861: 3857: 3802: 3762: 3760: 3668: 3648: 3620:— Preceding 3509:User:rdsomma 3506: 3492: 3485: 3422: 3270: 3264: 3204: 3202: 3016: 3013: 2827:, giving us 1810: 1803: 1290: 1286: 1281:. Then the 1278: 1274: 1270: 1266: 1262: 1258: 1254: 1101: 1082: 985: 981: 979: 963: 959: 872: 858: 751: 722: 442: 361: 355: 326: 279: 271:, right? -- 268: 266: 241: 201: 137:Low-priority 136: 96: 62:Low‑priority 40:WikiProjects 2999:24.58.159.5 1816:= 1 so that 217:Engineering 208:engineering 164:Engineering 112:Mathematics 103:mathematics 59:Mathematics 30:Start-class 4256:Categories 3894:. It was 1277:) for all 752:normalized 424:Dirac comb 408:Dirac comb 2368:) to get 1625:and where 4221:Bwechner 3941:unsigned 3825:Melcombe 3634:contribs 3622:unsigned 1085:cherkash 970:symbol. 968:cyrillic 356:... to Δ 341:Pgabolde 273:Pgabolde 3626:Rdsomma 3582:, not 1693:Now set 244:on the 139:on the 3665:A fact 2097:ansatz 1243:Abdull 1070:Tweenk 36:scale. 3961:intgr 3900:could 3495:Bob K 1413:where 972:r b-j 851:r b-j 428:r b-j 412:r b-j 364:) or 4244:talk 4225:talk 4199:and 4078:and 4018:and 3949:talk 3923:talk 3908:talk 3874:talk 3829:talk 3813:talk 3789:talk 3656:talk 3630:talk 3499:talk 3003:talk 1662:< 1649:< 1293:) is 1285:for 1269:) = 1253:Let 1102:Why 1089:talk 1074:talk 4159:or 3919:PAR 3870:PAR 3809:PAR 3686:sin 3617:. 3531:or 3468:QED 1931:of 1475:and 1275:t-T 1010:KYN 950:KYN 861:KYN 837:KYN 329:PAR 236:Low 131:Low 4258:: 4246:) 4227:) 4187:δ 4147:Σ 4126:δ 4066:δ 4058:. 3998:, 3986:δ 3951:) 3925:) 3910:) 3876:) 3831:) 3815:) 3791:) 3740:π 3734:− 3725:δ 3720:∞ 3715:∞ 3712:− 3702:∑ 3689:⁡ 3680:δ 3658:) 3636:) 3632:• 3595:π 3562:π 3539:ω 3507:-- 3501:) 3493:-- 3453:ν 3447:δ 3438:ν 3406:ν 3397:π 3388:− 3361:∞ 3356:∞ 3353:− 3343:∑ 3315:ν 3302:∞ 3297:∞ 3294:− 3284:∑ 3239:δ 3223:⟺ 3168:π 3159:− 3142:δ 3137:∞ 3132:∞ 3129:− 3125:∫ 3101:π 3092:− 3075:δ 3040:− 3036:∫ 3005:) 2974:π 2958:∞ 2953:∞ 2950:− 2940:∑ 2910:− 2901:δ 2896:∞ 2891:∞ 2888:− 2878:∑ 2747:− 2703:π 2694:− 2648:π 2639:− 2613:− 2604:δ 2599:∞ 2594:∞ 2591:− 2581:∑ 2533:∫ 2499:or 2470:π 2461:− 2402:∫ 2347:δ 2313:π 2304:− 2285:π 2232:∫ 2169:π 2143:∞ 2138:∞ 2135:− 2125:∑ 2066:− 2057:δ 2052:∞ 2047:∞ 2044:− 2034:∑ 1950:π 1884:π 1868:∞ 1863:∞ 1860:− 1850:∑ 1769:− 1760:δ 1755:∞ 1750:∞ 1747:− 1737:∑ 1668:∞ 1646:∞ 1643:− 1577:π 1568:− 1517:∫ 1441:≡ 1371:π 1345:∞ 1340:∞ 1337:− 1327:∑ 1218:π 1209:− 1199:∞ 1194:∞ 1191:− 1181:∑ 1157:− 1146:δ 1141:∞ 1136:∞ 1133:− 1123:∑ 1091:) 1076:) 996:Δ 936:Δ 916:Δ 849:. 817:Δ 790:Δ 763:Δ 732:Δ 685:Δ 650:− 633:δ 628:∞ 623:∞ 620:− 610:∑ 572:− 549:δ 544:∞ 539:∞ 536:− 526:∑ 510:− 501:δ 496:∞ 491:∞ 488:− 478:∑ 456:Δ 373:Δ 303:− 294:δ 291:∑ 4242:( 4223:( 4207:t 4167:k 4106:t 4086:t 4046:T 4026:T 4006:t 3947:( 3921:( 3906:( 3872:( 3866:z 3862:x 3858:x 3827:( 3811:( 3787:( 3746:, 3743:) 3737:n 3731:t 3728:( 3709:= 3706:n 3698:= 3695:) 3692:x 3683:( 3654:( 3628:( 3605:T 3601:/ 3592:2 3570:T 3566:/ 3559:2 3519:f 3497:( 3459:. 3456:) 3450:( 3444:= 3441:) 3435:( 3432:F 3403:T 3400:n 3394:2 3391:i 3384:e 3378:) 3375:T 3372:n 3369:( 3366:f 3350:= 3347:n 3339:T 3336:= 3332:) 3326:T 3323:k 3318:+ 3311:( 3307:F 3291:= 3288:k 3271:: 3269:) 3251:. 3248:) 3245:f 3242:( 3229:F 3214:1 3205:: 3188:, 3185:f 3182:d 3177:T 3174:f 3171:n 3165:2 3162:i 3155:e 3151:) 3148:f 3145:( 3121:= 3118:f 3115:d 3110:T 3107:f 3104:n 3098:2 3095:i 3088:e 3084:) 3081:f 3078:( 3068:T 3065:2 3061:1 3052:T 3049:2 3045:1 3032:= 3029:1 3017:: 3001:( 2983:T 2980:f 2977:n 2971:2 2968:i 2964:e 2947:= 2944:n 2934:T 2931:1 2926:= 2923:) 2918:T 2915:k 2907:f 2904:( 2885:= 2882:k 2853:T 2850:1 2845:= 2840:n 2836:c 2815:0 2812:= 2809:k 2789:T 2785:/ 2781:k 2761:T 2758:2 2754:/ 2750:1 2744:= 2739:0 2735:f 2712:T 2709:f 2706:n 2700:2 2697:i 2690:e 2665:f 2662:d 2657:T 2654:f 2651:n 2645:2 2642:i 2635:e 2630:) 2626:) 2621:T 2618:k 2610:f 2607:( 2588:= 2585:k 2576:( 2570:T 2566:/ 2562:1 2559:+ 2554:0 2550:f 2542:0 2538:f 2527:T 2524:1 2519:= 2514:n 2510:c 2487:f 2484:d 2479:T 2476:f 2473:n 2467:2 2464:i 2457:e 2453:) 2450:t 2447:( 2444:x 2439:T 2435:/ 2431:1 2428:+ 2423:0 2419:f 2411:0 2407:f 2396:T 2393:1 2388:= 2383:n 2379:c 2354:n 2351:m 2341:T 2338:1 2333:= 2330:f 2327:d 2322:T 2319:f 2316:n 2310:2 2307:i 2300:e 2294:T 2291:f 2288:m 2282:2 2279:i 2275:e 2269:T 2265:/ 2261:1 2258:+ 2253:0 2249:f 2241:0 2237:f 2209:n 2205:c 2178:T 2175:f 2172:n 2166:2 2163:i 2159:e 2153:n 2149:c 2132:= 2129:n 2121:= 2118:) 2115:f 2112:( 2109:x 2079:) 2074:T 2071:k 2063:f 2060:( 2041:= 2038:k 2030:= 2027:) 2024:f 2021:( 2018:x 1982:? 1966:t 1961:0 1957:f 1953:n 1947:2 1944:i 1940:e 1916:. 1900:t 1895:0 1891:f 1887:n 1881:2 1878:i 1874:e 1857:= 1854:n 1846:= 1843:) 1840:t 1837:( 1834:x 1813:n 1811:c 1806:n 1804:c 1778:) 1775:T 1772:k 1766:t 1763:( 1744:= 1741:k 1731:T 1728:1 1723:= 1720:) 1717:t 1714:( 1711:x 1665:+ 1657:0 1653:t 1601:t 1598:d 1593:t 1588:0 1584:f 1580:n 1574:2 1571:i 1564:e 1560:) 1557:t 1554:( 1551:x 1546:T 1543:+ 1538:0 1534:t 1526:0 1522:t 1511:0 1507:f 1503:= 1498:n 1494:c 1449:T 1446:1 1436:0 1432:f 1387:t 1382:0 1378:f 1374:n 1368:2 1365:i 1361:e 1355:n 1351:c 1334:= 1331:n 1323:= 1320:) 1317:t 1314:( 1311:x 1291:t 1289:( 1287:x 1279:t 1273:( 1271:x 1267:t 1265:( 1263:x 1259:t 1257:( 1255:x 1227:T 1224:n 1221:f 1215:2 1212:i 1205:e 1188:= 1185:n 1177:= 1171:) 1165:T 1162:k 1154:f 1150:( 1130:= 1127:k 1117:T 1114:1 1087:( 1072:( 1052:) 1049:t 1046:( 1041:T 1036:I 1033:I 1030:I 986:t 984:( 982:s 964:t 962:( 960:s 896:) 893:t 890:( 887:I 884:I 881:I 821:T 794:1 767:1 736:T 708:) 705:T 701:/ 697:t 694:( 689:1 677:| 673:T 669:| 664:1 659:= 656:) 653:k 647:T 643:/ 639:t 636:( 617:= 614:k 602:| 598:T 594:| 589:1 584:= 581:) 578:] 575:k 569:T 565:/ 561:t 558:[ 555:T 552:( 533:= 530:k 522:= 519:) 516:T 513:k 507:t 504:( 485:= 482:k 474:= 471:) 468:t 465:( 460:T 388:) 385:t 382:( 377:T 362:t 360:( 358:T 312:) 309:T 306:n 300:t 297:( 248:. 143:. 42::

Index


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Mathematics
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WikiProject Mathematics
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Engineering
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Pgabolde
20:23, 26 August 2005 (UTC)
PAR
21:27, 26 August 2005 (UTC)
Pgabolde
15:41, 27 August 2005 (UTC)
Dirac delta function

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