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    • a stub, for the moment just so as to make links work

      v1, current

    • added references listing formulas for inverses of various block matrices

      diff, v8, current

    • definition, couple of relevant properties, and references

      v1, current

    • brief category:people-entry for hyperlinking references

      v1, current

    • I have added a little bit to supermanifold, mainly the definition as manifolds over superpoints, the statement of the equivalence to the locally-ringed-space definition and references.

    • brief category:people-entry for hyperlinking references

      v1, current

    • starting a page in order to be able to point readers more concretely to this old original part of the the big edifice that differential geometry has become

      v1, current

    • added pointer to:

      • John M. Lee, Riemannian manifolds. An introduction to curvature. Graduate Texts in Mathematics 176 (1997), Springer. ISBN: 0-387-98271-X. Second Edition (retitled): Introduction to Riemannian Manifolds (2018), Springer. ISBN: 978-3-319-91754-2 (doi:10.1007/978-3-319-91755-9)

      diff, v16, current

    • brief category:people-entry for hyperlinking references

      v1, current

    • have expanded the single sentence at differential geometry to something like a paragraph, indicating how differential geometry is the “higher geometry modeled on the pre-geometry 𝒢=CartSp\mathcal{G} = CartSp

    • starting something on isometric immersions

      — mainly I was trying to track down a reference that would clearly state that orthonormal “adapted” or “Darboux” (co)frames (here) always exist locally for an immersion into a Riemannian manifold.

      What I found so far is

      Mastrolia, Rigoli & Setti 2012, p. 33, where this is claimed, but just in passing

      and

      Chen & Giron 2021, Thm. 2.2, where this is stated in the generality of sequences of immersions, which makes it hard to recognize the simple statement behind all the analytic fine-print.

      v1, current

    • Since someone is adding links to Narya from other pages, we may as well have at least a stub page for it.

      v1, current

    • starting page on one-to-one correspondences

      Anonymous

      v1, current

    • starting page on definitional isomorphisms

      Anonymouse

      v1, current

    • added to closed monoidal category a proof that the pointwise tensor product on a functor category with complete codomain is closed.

    • starting page on record types

      Anonymouse

      v1, current

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

      Anonymous

      v1, current

    • brief category:people-entry for hyperlinking references

      v1, current

    • brief category:people-entry for hyperlinking references

      v1, current

    • Created internal profunctor, which also describes an idea I saw somewhere about internal diagrams in fibrations over the base category. I added what I think are two examples, and asked a generic 'Help!' question. It might be better off on a page of its own, though.

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

      Anonymous

      v1, current

    • the concept of a weak type theory as a dependent type theory where all type formers are weak in the sense that they use identity types instead of judgmental equality in the computation and uniqueness rules

      Anonymouse

      v1, current

    • Fix typo, fix sign, add spherical coordinates.

      diff, v5, current

    • Created a page. Right now mostly references.

      v1, current

    • Corrected an arithmetic error in the last section.

      diff, v14, current

    • brief category:people-entry for hyperlinking references

      v1, current

    • added references to Lean

    • vn enveloping algebra has VERY different spectrum from the original (the spectrum of the vn enveloping algebra of C(K) is the so-called “hyperstonean envelope” of K, and is quite intractable)

      Vasily Melnikov

      diff, v8, current

    • brief category:people-entry for hyperlinking references

      v1, current

    • American algebraist of a previous generation.

      v1, current

    • Added a section on left and right duals of corings.

      diff, v15, current

    • A noncommutative geometer. Person entry.

      v1, current

    • For completeness I have added pointer to

      though there should really be some accompanying discussion of how this form of the statement is related to the usual one in terms of presheaves.

      diff, v13, current

    • Changes made only to the Universal property of the 2-category of spans section. The citations by Urs lead to another citation which, in turn, leads to another citation. With a little effort, I tracked down the a full copy of said universal property, I’ve replicated it here, added the citation used, although I left the previous citations there for convenience; a more experienced editor can remove those if they would like.

      I would like to note that the author whose work I have referenced, Hermida, also notes: “[this universal property] is folklore although we know no references for it.”

      Please make any corrections needed and clean up the language here; this is a fairly direct copy of what is written, but I imagine somebody with more knowledge of all the language used here can rewrite this universal property stuff in a cleaner way.

      Thanks!

      Anonymous

      diff, v57, current

    • Added a reference

      • John Rognes, Galois extensions of structured ring spectra/Stably dualizable groups, Memoires of the American Mathematical Society, 192(898), 2008, partly available as (pdf)

      diff, v11, current

    • Created a page Morava K-theory . A lot to add. Will fill out later, with better reference list. Please edit!
    • A leading expert in Hopf algebras.

      v1, current

    • I noticed that the entry classifying space is in bad shape. I have added a table of contents and tried to structure it slightly, but much more needs to be done here.

      I have added a paragraph on standard classifying spaces for topological principal bundles via the geometric realization of the simplicial space associated to the given topological group.

      In the section “For crossed complexes” there is material that had been provided by Ronnie Brown which needs to be harmonized with the existing Idea-section. It proposes something like a general axiomatics on the notion of “classifying space” more than giving details on the geometric realization of crossed complexes

    • I fixed a link to a pdf file that was giving a general page, and not the file!