Wikipedia:Articles for deletion/Diffeo (disambiguation)


 * The following discussion is an archived debate of the proposed deletion of the article below. Please do not modify it. Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a deletion review).  No further edits should be made to this page.

The result was delete. Ritchie333 (talk) (cont)  17:27, 4 March 2021 (UTC)

Diffeo (disambiguation)

 * – ( View AfD View log )

This disambiguation page has only the primary term (a redirect to Diffeomorphism) plus one other link, to Diffeo (company). The only other possible link I can find is Diffeology, though that seems different enough to me that it is not really ambiguous. Cnilep (talk) 03:12, 16 February 2021 (UTC)
 * Note: This discussion has been included in the list of Organizations-related deletion discussions. Cnilep (talk) 03:12, 16 February 2021 (UTC)
 * Note: This discussion has been included in the list of Mathematics-related deletion discussions. Cnilep (talk) 03:12, 16 February 2021 (UTC)
 * Note: This discussion has been included in the list of Disambiguations-related deletion discussions. Cnilep (talk) 03:12, 16 February 2021 (UTC)
 * I created this disambiguation page and concur that it should be deleted., perhaps this is sufficient to close this discussion and mark it for deletion? jrf (talk) 04:31, 16 February 2021 (UTC)
 * Correction... I was thinking this should be a WP:G14, but I now think this should be *kept*. I've now read the article on diffeology, and found diffeomorphometry and more interestingly found the diffeomorphism anomaly page that redirects to the gravitational anomaly page, which is the context within which I first heard the truncation of diffeomorphism to just "diffeo."  These are all quite different things, such that a person speaking in one of these contexts might naturally shorten to "diffeo" without fear of ambiguity in context.  I think disambiguation pages are intended for exactly this purpose, so I reverse my opinion -- I think this should be kept.  Also, I've updated this page to list these additional meanings. jrf (talk) 05:16, 16 February 2021 (UTC)
 * If the things that Jrf added are called diffeo (as opposed to having that as part of their name), then the page should indeed be kept. I don't know enough about mathematics or physics to determine whether that is the case. In any case, thank you, Jrf, for your additions and your comments here. Cnilep (talk) 23:38, 16 February 2021 (UTC)
 * (Note that jrf is a co-founder of Diffeo the company, according to his user page, and while I thank him for making it clear there, I think it would have been proper under Conflict of interest to disclose this explicitly when editing related pages and participating in deletion discussions. But anyway, I don't mean this as a personal attack or to take away from the discussion of the merits.) I agree with Cnilep that, unlike for "diffeomorphism", it's unclear whether sources actually refer to "diffeology" or any of the other items using the standalone term "diffeo". Are there sources to support that? Adumbrativus (talk) 03:59, 18 February 2021 (UTC)
 * Yes,, thank you for pointing that out. I should have made that more clear in this discussion instead of expecting people to open my user page.  I'd like to note that while there is an apparent CoI in my editing pages related to the word "diffeo" (and an apparent CoI is often indistinguishable to an actual CoI), my primary interest here is about language.  I think disambiguation pages are one of the coolest parts of Wikipedia, because they address the experience of learning by removing ambiguity---hence my further comment below. jrf (talk) 14:26, 24 February 2021 (UTC)

 Relisted to generate a more thorough discussion and clearer consensus.
 * Googling suggests that "diffeo" is an occasionally-used abbreviation for "diffeomorphism" (as here, though not mentioned in the target article), but that probably the company is the primary topic and should be moved to the base title (the hatnote already there on the company page does what's needed). No need for a dab page either way. Pam  D  14:40, 18 February 2021 (UTC)
 * Noting the CoI discussion above, I'd like to suggest there is a pedagogical reason to consider having the title "Diffeo" point at the disambiguation page itself (bullet points below). I defer to more experienced Wikipedians on best approach. jrf (talk) 14:26, 24 February 2021 (UTC)
 * The etymology of the word "diffeomorphism" is a combination of three roots: "differentiable" (sufficiently smooth, etc), "homeo" (opposite of hetero), and "morphism" (a transformation), so it means, essentially "a smooth transformation that brings a thing back to itself."  With that grounding in hand, it's clear that it is exceedingly general.  The concept is useful in extremely diverse technical settings, i.e. research communities whose members might never interact.  (While there are examples of diffeomorphisms that are not homeomorphisms, that's a technicality.)
 * It is very natural to clip diffeomorphism or diffeomorphic to just diffeo. From OED, an early, possibly the first use of the word diffeomorphic was also clipped to diffeo:  1953   W. Ambrose & I. M. Singer in Trans. Amer. Math. Soc. 75 428   "We use the word ‘diffeo’ for a 1:1 differentiable mapping of one manifold onto another whose inverse is also differentiable and call the manifolds diffemorphic [sic]."  Hilarious that they (accidentally) dropped the "o" in diffeomorphic in that sentence, but reinserted it later in that paper.
 * Clipping to diffeo is especially useful when speaking. A lecturer talking about smooth transformations that bring a thing back to itself can side-step the tongue-twister of saying diffeomorphism over and over by replacing it with the word diffeo.
 * This organically produces the need for disambiguation, because a discussion about gravity or sets or computational anatomy or dynamical systems might all use the word "diffeo" with large presumed context. When a novice joins such a conversation, and they encounter this unknown word "diffeo," we (as Wikipedians) hope that they can efficiently discover the full article about that specialized use of the word.
 * Here are examples of online discussions and lecture presentations that truncate to "diffeo." Most of these also spell out the word diffeomorphism, so these are just indicative of what might occur in a verbal discussion: diffeo in lecture about sets, diffeo in discussion about computational anatomy, diffeo in lecture about gravity.  Easy to find more by googling for ["diffeo" "gravity" ] or ["diffeo" "anatomy" ] etc  jrf (talk) 14:26, 24 February 2021 (UTC)

Please add new comments below this notice. Thanks,  Sandstein   19:25, 24 February 2021 (UTC)
 * Delete. I'm satisfied that there are really only two topics, and the current arrangement of a primary redirect is fine. Shhhnotsoloud (talk) 18:25, 1 March 2021 (UTC)
 * Delete per WP:2DABS. —David Eppstein (talk) 20:51, 3 March 2021 (UTC)
 * Delete. The hatnote on the company page will be enough to get readers to the right place (as long as it stays there). Ebony Jackson (talk) 04:43, 4 March 2021 (UTC)


 * The above discussion is preserved as an archive of the debate. Please do not modify it. Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a deletion review). No further edits should be made to this page.