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bio website math.northwestern.edu/…
location Seattle, WA
age 21
visits member for 4 years, 3 months
seen 6 hours ago
Graduate student at Northwestern. Feel free to email me at dwilson [at] u. northwestern. edu :)

Sep
19
comment Letter from Grothendieck to Tate on “crystals”
although it looks like the top of every page is missing a line... which is unfortunate.
Sep
19
comment Letter from Grothendieck to Tate on “crystals”
weird... it works now. Maybe I had a bad internet connection, or the site was having trouble earlier. Thank you!
Sep
18
comment Letter from Grothendieck to Tate on “crystals”
Did you ever end up writing up the letter? The link in your post doesn't seem to be working, and I can't find the letter elsewhere by googling.
Sep
5
comment $H^4(BG,\mathbb Z)$ torsion free for $G$ a connected Lie group
but that's perhaps just as computational, and only covers the simply-connected case.
Sep
5
comment $H^4(BG,\mathbb Z)$ torsion free for $G$ a connected Lie group
If $G$ is simply connected then $\pi_i(G)$ is torsion-free for $i<4$ since $\pi_2$ of a Lie group is zero and $\pi_3$ is always torsion-free. Thus $\pi_i(BG)$ is torsion-free for $i\le 4$ and the result follows from mod C Hurewicz.
Aug
23
comment Morava $K(n)$'s are not $E_{\infty}$
At the prime 2 I don't even think they're homotopy commutative. In general they're probably not more than like... E_2. I don't know a reference... maybe Ravenel's orange book?
Jul
15
awarded  Informed
Jul
4
comment Mapping complexes in the simplicial localization of the category of manifolds
Oh dear you're right! My argument didn't make any sense- I think I was assuming something absolutely absurd in my head... like that $Mfld[W^{-1}]$ is a full subcategory of $Mfld$. hehe. doy...
Jul
4
revised Mapping complexes in the simplicial localization of the category of manifolds
added 137 characters in body
Jul
4
answered Mapping complexes in the simplicial localization of the category of manifolds
Jul
2
awarded  Curious
Jun
23
awarded  Great Question
Jun
23
awarded  Famous Question
Jun
21
awarded  Yearling
Jun
18
awarded  Popular Question
May
8
comment Spectral Sequences reference
@LeonLampret abuttment is the thing it's converging to. Derived $\otimes$ and derived Hom are functors taking in complexes and spitting out a complex. If you stick in complexes concentrated in degree 0, you get a complex whose homology is exactly Tor or Ext as it's usually defined.
May
8
comment Spectral Sequences reference
@LeonLampret Ah! Sorry, I misread your post. I don't think the spectral sequence that you claim exists, exists. The abuttment should be the derived tensor product, which would only agree with what you've written in the case that one of the complexes was, for example, a bounded below complex of flat modules. Similarly for the dual case- you'll probably get the abuttment to be the derived homs, and in general worry about projectivity or injectivity
May
8
comment Spectral Sequences reference
And to address your more general question: Right now I think the best such reference is Google.
May
8
comment Spectral Sequences reference
The "Kunneth spectral sequence" is, in fact, in Weibel. Theorem 5.6.4.
Apr
30
awarded  Popular Question