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# Questions

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### What is the universal deformation of the formal additive group $\widehat{\mathbb{G}}_a$ over $\mathbb{F}_p$?

nov 27 at 19:54 Eric Peterson 2,93411428

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### On the natural (bigraded) homotopy groups of a simplicial object in a model category

oct 22 at 18:21 Tyler Lawson 18.7k24490

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### relationships between properties of model categories

sep 13 at 11:54 Aaron Mazel-Gee 3,308621

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### If $A\in \mbox{Rings}\subset E_\infty\mbox{-rings}$, what is the equivalence between objects of $\mathcal{D}(\mbox{Mod}_A)$ and $A$-module spectra?

jan 30 12 at 20:33 Justin Noel 57427

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### reference request: John Baez on (-1)- and (-2)-categories and properties+structure+stuff

nov 8 11 at 10:49 Gonçalo Marques 286258

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### How can I see that $H\mathbb{Z}$ doesn’t admit a Bousfield complement?

jul 29 11 at 10:53 Neil Strickland 13.3k12866

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### (Sh,Sh-map) represents the category of sheaves on a stack.

jul 29 11 at 10:37 S. Carnahan 25.6k4190

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### Can one use Atiyah-Singer to prove that the Chern-Weil definition of Chern classes are $\mathbb{Z}$-cohomology classes?

jun 30 11 at 13:28 Paul Siegel 9,60023374

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### homological algebra with spectra

jun 9 11 at 18:52 Dan Ramras 3,73121626

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