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    • Put some content here, as a disambiguation page.

      diff, v3, current

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

      v1, current

    • I have done a fair bit of editing to décalage.

      1. expanded the Definition-section to make it contain explcitly the three different perspectives and their relation:

        a) in components, b) as a restriction of ordinary décalage, c) in terms of joins and cones;

      2. changed notation from “DecDec” to “Dec 0Dec_0”, not to collide with the notation for total décalage;

      3. finally added the explicit discussion and proof that for XX a Kan complex, Dec 0XXDec_0 X \to X is a Kan fibration replacement of the canonical effective epimorphism X 0XX_0 \to X. (you may remember – but hopefully not – that we had a bit of confused discussion about this a few years back, which I don’t want to keep from falling into oblivion by linking to it again… ;-)

      4. added more references with some of the lemmas that I am citing, mostly by Danny Stevenson, and also a technical result in Joyal’s lectures.

    • brief category:people-entry for hyperlinking references

      v1, current

    • brief category:people-entry for hyperlinking references

      v1, current

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

      v1, current

    • a bare minimum, for the moment just as to satisfy links

      v1, current

    • Clarify how few decidable subsets the real line can have and give examples of when this happens.

      diff, v11, current

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

      v1, current

    • I edited lambda-ring, added a definition from the thesis of John R. Hopkins. Later on I will add the definitions of Hazewinkel, too. This entry has a long (and very instructive) idea-section. Maybe I find time to fill in some more details to these ideas.

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

      v1, current

    • Added a reference to a recent paper on the transcendental ideal by Kovač.

      diff, v9, current

    • at books about string theory I have added some paragraphs with descriptions of books in the first section (“Mathematically inclined monographs about string theory”)

    • starting something – not done yet but need to save

      v1, current

    • Removed the reference to Mike Shulman’s blog articles in HoTT since they don’t specifically mention this spectral sequence.

      diff, v10, current

    • Can we think of free cocompletion as a left adjoint? In what follows, by ’cocomplete’ I mean ’having all small colimits’.

      Free cocompletion can’t be a left adjoint functor from CatCat (the category of small categories) to CocompleteCATCocompleteCAT (the category of locally small cocomplete categories), because there’s no right adjoint CocompleteCATCatCocompleteCAT \to Cat.

      Also surely not from CatCat to CocompleteCatCocompleteCat (the category of small cocomplete categories), because there just aren’t enough small cocomplete categories: only posets.

      The article on free cocompletion mentions a free cocompletion functor from CATCAT (the category of locally small categories) to CocompleteCATCocompleteCAT, studied by Day and Lack. There’s an obvious candidate right adjoint from CocompleteCATCocompleteCAT to CATCAT. So this might work!

      Does it?

      Day and Lack work in the enriched case, and I’m a bit confused, but they seem to imply that free cocompletion is a pseudomonad on CATCAT, which would be a step in the right direction.

    • brief category: people-entry for hyperlinking references

      v1, current

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

      v1, current

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

      Anonymous

      v1, current

    • splitting this off from AdS3/CFT2 as an entry just listing references, to be !includeed into the References-lists of other entries

      v1, current

    • starting a category:reference-entry – not done yet (on my phone here…)

      v1, current

    • (created my own page because I have a huge ego)

      v1, current

    • starting something – not done yet but need to save

      v1, current

    • Detection of the 21cm hydrogen absorption line expected in the CMB has been claimed now. Such a detection is thought to have implications for observational cosmology comparable in relevance to those of the recent gravitational wave detection. I have collected some original articles and reviews here in an otherwise empty entry hydrogen line

    • Fixed link to Leonardo Rastelli, Lectures on open/closed string duality

      Anonymous

      diff, v3, current

    • stub entry, for the moment just so as to satisfy links

      v1, current

    • I keep having the need to point to something like mass gap problem. So now I created a stub for it, just so that the links works. Has to be expanded, clearly.

    • created just to satisfy liunks, but I added a minimum of an Idea-section

      v1, current

    • stub, for the moment just so as to satisfy links

      v1, current

    • added a graphics showing length scales of fundamental physics in the observable universe

      diff, v4, current