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    • Minor change to wording. (Starting a paragraph with ‘But’ is often …..!);-)

      diff, v29, current

    • Page created, but author did not leave any comments.

      v1, current

    • a table meant for !inclusion into the “Related concepts”-sections of related entries, collecting the different notions of curvature in Riemannian geometry

      v1, current

    • added

      • brief Idea-section

      • hyperlinks for remaining keywords

      • cross-links with hyperbolic space

      • subsection headers

      • floating context toc

      diff, v2, current

    • the minimum definition, some references (we didn’t have this anywhere on the nLab it seems, or do we somewhere?)

      v1, current

    • I am beginning to collect stuff in this entry that has been distributed over various other entries. Will now be expanding this material a little…

      v1, current

    • Page created, but author did not leave any comments.

      Alexander Campbell

      v1, current

    • Defined a crossed G-set in an explicit way, and described explicitly the braiding on the category of crossed G-sets. Gave reference to Braided tensor categories by Joyal and Street. Plenty more could be added (e.g. more categorical point of view on what a crossed G-set is, Drinfeld centres, …).

      v1, current

    • Started linear-non-linear logic, more to come.

      v1, current

    • split off “neutral element” from “monoid” (to which it used to be redirecting)

      Just such as to clesan up the link structure a little.

      v1, current

    • Page created, but author did not leave any comments.

      Chenchang Zhu

      v1, current

    • Repaced “identity element” by “neutral element” (i.e. with the hyperlink),

      subdivided into sections “Definition” and “Categorification”

      added Section “Related concepts” with pointer to zero morphisms (which would well deserve to be mentioned in the main text, before the business about categorification) and trivial group

      added a table of contents, and a floating context menu.

      (much ado about zero…)

      diff, v4, current

    • stated the definition and added some references. Nothing substantial yet

      v1, current

    • I have added pointer here to the lecture notes

      • Andrew Blumberg, Equivariant homotopy theory, 2017 (pdf, GitHub)

      and I am in the process of adding that same pointer to each and every entry on equivariant homotopy theory, preferably before sending the reader to the Arctic reference…

      diff, v3, current

    • This entry was missing, as David C. pointed out here

      v1, current

    • There seem to be a lot of questions on the Internet recently about disjointness of homsets of categories, so I thought this definition would be worth recording.

      v1, current

    • Edited the first sentence to something more informative, moved Klein’s own texts from “References” to “Writings” and adjusted a little.

      diff, v5, current

    • brief category:reference entry on Bredon’s book, for ease of hyperlinking

      v1, current

    • Changed the page name to “REF MakkaiReyes77” and gave the bullet item an anchor of the same name, such that one can point to it after it is included anywhere.

      This format “AuthornameYear” seems a decently robust identification. I have been using this for anchor names to rference items on the nLab for long time now.

      diff, v2, current

    • am starting some minimum. Not done yet…

      v1, current

    • In the article exterior+algebra, in sect. 2, subsection In General, it says that the nth exterior power of an object V is the cokernel of the antisymmetrization operator

      PA=1n!σSnsgn(σ)σ.

      Shouldn’t the exterior algebra be the image of this operator? If so, I am happy to edit the article accordingly.

    • I have adjusted the formatting to harmonize with established convention (bullet item).

      Added clarification that the new pdf version is due to and with contributions by Francisco Marmolejo and gave the direct pointer to the pdf, too.

      Will !include this now at logic.

      diff, v2, current

    • I just included a link into this new page, but it needs to be announced at the nLab.

      diff, v2, current

    • Nikolai Durov’s 132-page technical document on Telegram Open Network uses type theory notation in some paragraphs on the currently developing Telegram’s version of ’5-th generation’ blockchain technology, and claims to use in fact the Martin-Loef’s type theory. In the update I also included the link to the ’whitepaper’ and the technical document.

      I also gave a link to the first of a series of 3 papers of Durov to appear in Algebra i analiz, though only the abstract, the first page and the references seem to be downloadable at the moment. There seem to be no arXiv or other public version and the official site of the St. Petersburg Journal of Mathematics is 3 issues backwards till the actual appearance there. Their title is Homotopy theory of normed sets. Its contents generalize part of the formalism from

      • Paugam F., Overconvergent global analytic geometry, 2015, arXiv:1410.7971v2

      diff, v16, current

    • added pointer to the essay Missed opportunities from 1972. What a remarkable document and what an enjoyable read! (I had never looked at this before.)

      diff, v6, current

    • added missing cross-link with cyclic set.

      Some harmonizing might be necessary here, maybe entries should actually be merged.

      diff, v4, current

    • I made the definition of linear interval explicit at interval, also correspondingly streamlined slightly the corresponding text at classifying topos.

    • A stub on computer software Cadabra.

      v1, current

    • updated “counterxample” link from its ancient nForum location

      diff, v9, current

    • I noticed that Welcome to the nForum (nlabmeta) instructed users to make query boxes. I believe query boxes are now deprecated, so I removed that instruction.