I am creating this entry to resolve a dangling entry in the Lorentz group entry.

Avi Levy

]]>added a minimum to *Lorentz group*.

created concrete site

]]>Quick page, analogous to walking isomorphism.

]]>have split off *tensor product of abelian groups* from *tensor product* and expanded slightly

Created page, copying material from the one on David Roberts’ web.

]]>I added to walking structure a 2-categorical theorem that implies that usually “the underlying X of the walking X is the initial X”. This fact seems like it should be well-known, but I don’t offhand know a reference for it, can anyone give a pointer?

]]>Creating the page, linked to from isofibration currently. Not yet finished, but contains so far the definition and some remarks on expressing it as a lifting condition. In a later edit, I will discuss the second condition, and remark on viewing Lack fibrations as ’Hurewicz fibrations’.

]]>Creating page to satisfy a link.

]]>Little page to focus on this important notion, as opposed to the general remarks at walking structure.

]]>polished a bit and expanded a bit at interval category (nothing deep, just so that it looks better)

]]>Make the hyperlink point to the topologist, not the statistician.

]]>I have expaned a bit at *Ab*: added a section with some basics on direct sums and tensor products and then slightly expanded on the monoidal category structures.

just testing latex code since there’s no way to preview in the nLab editor Please get a preview button and a way to debug latex code it literally happens everytime I try to edit

$\array{ \delta_i^{n+1} \circ \delta_j^n = \delta_{j+1}^{n+1}\circ \delta_i^n & \qquad i \leq j \\ \sigma_j^n \circ \sigma_i^{n+1} = \sigma_i^n \circ \sigma_{j+1}^{n+1} & \qquad i \leq j }$ ]]>I corrected a couple of wrong claims and added the link to a counter-example

AG

]]>To fulfil a link.

]]>Added a reference.

]]>at *isofibration* I have added a pointer to Brown 70. And I replaced a paragraph saying that isofibrations are “evil” by this modified paragraph

Since I found out there is such a thing, I’d better start a page.

]]>The paper “Left determined model categories” is published

Philippe Gaucher

]]>I wanted to record a result by Max Koecher on cones and Jordan algebras, and I wound up drastically expanding the page

]]>Some tidying up and additions at simplex category, in particular a section on its 2-categorical structure, and more on universal properties.

I’ve edited the definition to focus more on the augmented simplex category $\Delta_a$ instead of the ’topologists’ $\Delta$’, but I haven’t changed their names, because it seemed to me that that was the best way to keep everyone involved in the discussion at that page happy. (I also changed the ordinal sum functor from $+$ to $\oplus$, after Tim’s suggestion.)

]]>Added a reference to diffeological spaces.

]]>Added two redirects: !redirects pseudosimplicial bicategory !redirects pseudosimplicial bicategories

]]>Correct the characterization of nerves of groupoids.

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