bio | website | math.northwestern.edu/… |
---|---|---|
location | Seattle, WA | |
age | 21 | |
visits | member for | 4 years, 3 months |
seen | 6 hours ago | |
stats | profile views | 4,247 |
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 |