Knowledge (XXG)

Equidistant set

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245: 273: 224: 259: 49:(Article 15) establishes that, in absence of any previous agreement, the delimitation of the territorial sea between countries occurs exactly on the median line every point of which is equidistant of the nearest points to each country. Though the usage of the terminology is quite old, the study of the properties of equidistant sets as mathematical objects was initiated only in 1970's. 214: 44:
can also be realized as equidistant sets. This property of conics has been used to generalize the notion of conic sections. The concept of equidistant set is used to define frontiers in territorial domain controversies. For instance, the
46: 40:) from two or more sets. The equidistant set of two singleton sets in the Euclidean plane is the perpendicular bisector of the segment joining the two sets. The 378: 244: 213: 196:
The study of equidistant sets is more interesting in the case when the background metric space is the Euclidean space.
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Animation showing the equidistant set of two singleton sets in a Euclidean plane.
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Image showing equidistant set of two straight lines in a Euclidean plane.
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whose elements have the same distance (measured using some appropriate
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as an equidistant set of a singleton point and a straight line.
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Animation showing the generation of one branch of a
321:Mario Ponce, Patricio Santibánez (January 2014). 386:Proceedings of the American Mathematical Society 47:United Nations Convention on the Law of the Sea 8: 397: 346: 185:)}. This equidistant set is denoted by { 239: 208: 316: 314: 312: 310: 306: 262:Animation showing the generation of an 145:then the equidistant set determined by 280:as the equidistant set of two circles. 266:as the equidistant set of two circles. 7: 339:10.4169/amer.math.monthly.121.01.018 248:Animation showing the generation of 14: 327:The American Mathematical Monthly 377:J. B. Wilker (February 1975). 1: 141:are both nonempty subsets of 451: 236:Conics as equidistant sets 153:is defined to be the set { 281: 267: 253: 228: 218: 275: 261: 247: 226: 216: 282: 268: 254: 229: 219: 89:, the distance of 295:Generalized conic 286: 285: 233: 232: 38:distance function 442: 419: 418: 416: 414: 401: 383: 374: 368: 367: 365: 363: 350: 318: 240: 209: 450: 449: 445: 444: 443: 441: 440: 439: 425: 424: 423: 422: 412: 410: 399:10.2307/2039763 381: 376: 375: 371: 361: 359: 320: 319: 308: 303: 291: 238: 207: 202: 75:nonempty subset 55: 24:(also called a 22:equidistant set 12: 11: 5: 448: 446: 438: 437: 435:Conic sections 427: 426: 421: 420: 392:(2): 446–452. 369: 305: 304: 302: 299: 298: 297: 290: 287: 284: 283: 269: 255: 237: 234: 231: 230: 220: 206: 205:Straight lines 203: 201: 198: 97:is defined as 85:is a point of 54: 51: 42:conic sections 13: 10: 9: 6: 4: 3: 2: 447: 436: 433: 432: 430: 409: 405: 400: 395: 391: 387: 380: 373: 370: 358: 354: 349: 344: 340: 336: 332: 328: 324: 317: 315: 313: 311: 307: 300: 296: 293: 292: 288: 279: 274: 270: 265: 260: 256: 251: 246: 242: 241: 235: 225: 221: 215: 211: 210: 204: 199: 197: 194: 192: 188: 184: 180: 176: 172: 168: 164: 160: 156: 152: 148: 144: 140: 136: 132: 128: 124: 120: 116: 112: 108: 104: 100: 96: 92: 88: 84: 80: 76: 72: 68: 64: 60: 52: 50: 48: 43: 39: 35: 31: 27: 23: 19: 411:. Retrieved 389: 385: 372: 360:. Retrieved 348:10533/140755 333:(1): 18–32. 330: 326: 277: 263: 249: 195: 190: 186: 182: 178: 174: 170: 166: 162: 158: 154: 150: 146: 142: 138: 134: 130: 126: 122: 118: 114: 106: 102: 98: 94: 90: 86: 82: 78: 70: 67:metric space 62: 58: 56: 29: 25: 21: 15: 413:10 November 362:10 November 18:mathematics 301:References 53:Definition 357:207521114 278:hyperbola 429:Category 289:See also 250:parabola 200:Examples 30:bisector 408:2039763 264:ellipse 65:) be a 32:) is a 28:, or a 406:  355:  133:}. If 26:midset 404:JSTOR 382:(PDF) 353:S2CID 93:from 81:. If 73:be a 57:Let ( 20:, an 415:2015 364:2015 173:) = 149:and 137:and 129:in 109:) = 69:and 394:doi 343:hdl 335:doi 331:121 193:}. 157:in 125:): 111:inf 77:of 34:set 16:In 431:: 402:. 390:47 388:. 384:. 351:. 341:. 329:. 325:. 309:^ 189:= 181:, 169:, 161:: 121:, 113:{ 105:, 61:, 417:. 396:: 366:. 345:: 337:: 191:B 187:A 183:B 179:x 177:( 175:d 171:A 167:x 165:( 163:d 159:X 155:x 151:B 147:A 143:X 139:B 135:A 131:A 127:a 123:a 119:x 117:( 115:d 107:A 103:x 101:( 99:d 95:A 91:x 87:X 83:x 79:X 71:A 63:d 59:X

Index

mathematics
set
distance function
conic sections
United Nations Convention on the Law of the Sea
metric space
nonempty subset
inf





Generalized conic




"On equidistant sets and generalized conics: the old and the new"
doi
10.4169/amer.math.monthly.121.01.018
hdl
10533/140755
S2CID
207521114
"Equidistant sets and their connectivity properties"
doi
10.2307/2039763
JSTOR
2039763

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