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Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.

• added the statement (here) that Borel equivariant spectra are precisely the right induced genuine equivariant spectra

• I have added pdf-links to the reference

and promoted this to the top of the list, since I suppose this is the most comprehensive account that a reader might want to go to first. Will also edit accordingly at topological stack

• I kept being annoyed about the nature of discussion of the “multiverse” (the one in cosmology, not the one in set theory). Now I thought instead of steadily being annoyed, I should start an $n$Lab entry that does it better. So I did now (or tried to), at multiverse.

• Todd,

you added to Yoneda lemma the sentence

In brief, the principle is that the identity morphism $id_x: x \to x$ is the universal generalized element of $x$. This simple principle is surprisingly pervasive throughout category theory.

Maybe it would be good to expand on that. One might think that the universal property of a genralized element is that every other one factors through it uniquely. That this is true for the generalized element $id_x$ is a tautological statement that does not need or imply the Yoneda lemma, it seems.

• Adding my user page to the nLab. :)

Nico Courts

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• starting something and need to save – nothing here yet

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• some minimum, just for completeness

• added more references to 2-spectral triple (as far as I can see Jürg Fröhlich with his students was the first to try to formalize this to some extent)

• felt like archiving a quote by Paul Taylor somewhere, it is now at folklore.

Besides being funny, it is actually a useful comment for the newbie, and so I linked to it from category theory.

• I noticed that augmented simplicial set did not point anywhere, so i created the entry. But have no energy to put anything of substance there right now.

• to be !include-ed as a floating context menu into relevant entries

• starting something, and need to save. nothing here yet, just a moment…

• Over at Monster group, I wrote out a description via a group presentation. Of course, it makes no pretense to be illuminating (although it is well-known to experts like Conway; it’s probably in his book with Sloane on the Leech lattice and sphere packings).

• thought I had had created a brief entry with this title long ago, but apparently I didn’t

• considerably expanded the Idea-section

• am giving this book a category:reference-entry for ease of referencing

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