525:. So there are two genera of hyperbolic coordinate systems: those coming from hyperbolic geometry, and those coming from applied mathematics. The article is about hyperbolic coordinates in the latter sense, and a hatnote should be added to indicate the other meaning. Ultimately, if the article is kept, it will need to be completely rewritten from sources to indicate that, even in the second meaning of the term, there are various closely related coordinate systems that are called "hyperbolic", depending on the source.
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If this is so then please find a reference for the material in the article and add it. There is such a thing as same term being used to mean different things in different places. A raw Google hit count means nothing if all the hits are for something different or does not support the material. If the
361:
This is unsourced and probably original research (mostly written by a rather unreliable editor with a long history of using unorthodox terminology). It should be deleted unless someone can find at least one reliable source for this use of the term. The many hits for hyperbolic coordinates mentioned
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There are no references in the article so how can it be determined what is not OR? If there was anything in the article that I could substantiate then I wouldn't have done the AfD. Also, the coordinate curves for the coordinates defined similarly to polar coordinates are hyperbolas instead of
683:
makes little sense: it's just a coordinate system, so unless you define a metric it doesn't tell you which kind of space it is. "Coordinates that use hyperbolic functions in the same way that polar coordinates use trigonometric functions" are the same as those described here, except for a
816:
I misinterpreted what you were saying the first time but I see what you were getting at now. But we still need a reference for the coordinates as given in the article. I'll try to find where I saw the system I described earlier; maybe it can be used as the basis for a
426:. The term "hyperbolic coordinates" often refers to geodesic normal coordinates in a hyperbolic space. However, it is also often used in an unrelated way in applied mathematics to refer to coordinate systems like the one described in the article. For instance, the
378:
On 2nd thoughts, "hyperbolic coordinate system" is a legitimate title for an article, so can be kept, but the article needs be completely rewritten from scratch as the current version is original research and not what is usually meant by hyperbolic coordinate system.
653:
Well, in EDoM "parabolic coordinates" refer to the inverse coordinate system. This only further demonstrates my point: even in my latter sense, the terminology is not canonical but clearly refer to a collection of very closely related coordinate systems.
401:- There doesn't seem to be much material in this article that isn't already better-described elsewhere. The material not duplicated elsewhere reads like an essay on why the article's editor thinks the coordinate system is handy. Have one of the
549:
covers the system described as hyperbolic coordinates in the EDoM. It makes more sense to call them parabolic since the coordinate curves are parabolas. It might makes sense to talk about coordinates defined by the inverse relation
211:. These are unrelated to the material in the article. This has a large number of articles that link to it because it's included in a template for orthogonal coordinate (incorrect since the system in the article is not orthogonal).
164:
294:. The topic constitutes basic math. (we had to learn how to transform to hyperbolic coordinates in university, but you don't have to trust me - 632 hits on Google books are good enough). Some material there might be
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as a hyperbolic coordinate system. Related coordinate systems introduce hyperbolic functions to parameterize the hyperbolic angle, are closer to the coordinate system defined in the article: see, for instance,
317:
material was covered in your university then add your textbook as a reference. As of now I have no evidence that the creator of the article didn't make up a new meaning for a term with another meaning.--
199:
unrelated to the "Quadrant model" mentioned in the article. A search on "Quadrant model"+hyberbolic returned 0 hits. I also found a source that uses the term for coordinates that use
944:. As far as I can tell they only have the word "hyperbolic" in common. This is a coordinate system for a presumptively Euclidean space. Thus the suggestion that it be merged in to
794:-axis first, and if you pick axes which are rotated by 45° w.r.t. mine, you get the same coordinate system I would get if I used the formulas in the article. (Essentially, you use
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48:. No arguments for deletion aside from the nominator. The issue of merging, redirecting, renaming, or what have you can be discussed on the article's talk page. (
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Long standing unreferenced tag and a search did not produce anything to support the material. The term itself seems to be notable but as a coordinate system for
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My objective is to remove unreferenced material, so if the article is rewritten based on a reliable source it's fine with me.--
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229:. The subject is notable, as the proposer admits. The article is well written and well illustrated. The material at
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Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a
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Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a
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The following discussion is an archived debate of the proposed deletion of the article below.
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is a legitimate title. The article has been cleaned up over the past week with refs. added.
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to refer to the axes of the hyperbolas and I use them to refer to their asymptotes.)
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as hyperbolic coordinates but I didn't see this in any of my research.--
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is more advanced. The linkage between the articles can be improved.
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You didn't get the point: in order to define coordinates such that
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I do not see the phrase "Quadrant model" mentioned in the article.
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The above discussion is preserved as an archive of the debate.
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section, and "quadrant" is used several times in the article.
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Needs cleanup not deletion, as others have stated. --
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circles, so they are not rotationally equivalent.--
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editors fold any useful content in and redirect. --
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39:). No further edits should be made to this page.
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257:"Quadrant model" is in the title of the first
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362:above all seem to refer to something else.
729:given at the end of the lead to see it.)
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940:: I do not see why this article is in
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18:Knowledge (XXG):Articles for deletion
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679:but throw away the OR. Merging into
721:and substitute the expression for
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873:definition (or whatever name for
632:{\displaystyle v=(x^{2}-y^{2})/2}
514:{\displaystyle y=(u^{2}-v^{2})/2}
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969:Hyperbolic coordinate system
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1008:. I agree with Gandalf61.
981:Elliptic coordinate system
269:) 20:10, 5 June 2010 (UTC)
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62:00:34, 12 June 2010 (UTC)
1057:Please do not modify it.
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338:. Subject is canonical.
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290:Improve - yes, delete -
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32:Please do not modify it.
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715:sin(45°) +
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273:Cuddlyable3
238:Cuddlyable3
159:free images
54:Ron Ritzman
1010:Xxanthippe
817:rewrite.--
432:refers to
340:Xxanthippe
1023:Definite
993:Gandalf61
950:JRSpriggs
928:Falcorian
403:WP:WPMATH
971:(as per
883:A. di M.
804:A. di M.
790:- and a
731:A. di M.
719:cos(45°)
704:sin(45°)
271:Thanks.
120:View log
1006:Comment
938:Comment
424:Comment
407:WP:PHYS
259:chapter
255:Comment
165:WP refs
153:scholar
93:protect
88:history
897:RDBury
837:RDBury
819:RDBury
750:RDBury
641:RDBury
381:r.e.b.
364:r.e.b.
355:Delete
319:RDBury
292:no way
213:RDBury
137:Google
97:delete
831:It's
711:′ = −
296:WP:OR
180:JSTOR
141:books
114:views
106:watch
102:links
16:<
1043:talk
1039:AWHS
1031:Keep
1025:keep
1014:talk
997:talk
987:and
965:Keep
954:talk
924:Keep
901:talk
887:talk
877:and
869:sinh
857:cosh
841:talk
833:here
823:talk
808:talk
798:and
782:sinh
770:cosh
754:talk
735:talk
725:and
696:′ =
677:Keep
662:talk
645:talk
533:talk
415:talk
385:talk
368:talk
344:talk
336:Keep
323:talk
304:talk
277:talk
267:talk
263:MKFI
242:talk
227:Keep
217:talk
207:use
173:FENS
147:news
110:logs
84:talk
80:edit
58:talk
46:keep
835:.--
405:or
187:TWL
122:•
118:– (
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