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cohenicsection
@cohenicsection.bsky.social
phd student in geometry, topology and math phys at umn
November 6, 2025 at 6:49 PM
absolute dreck. one of the speakers immediately claims that "wokeness" is inherently feminized? how are these people writing entire books about words they don't even know the history or meaning of?
November 6, 2025 at 6:47 PM
I've come up with like 3 somewhat interesting constructions these past couple weeks by just be like "what if" and then writing it down
September 23, 2025 at 2:46 PM
Reposted by cohenicsection
For the math folks on here: NSF has suspended Terry Tao's grant. www.nsf.gov/awardsearch/...
NSF Award Search: Award # 2347850
Structure theory for measure-preserving systems, additive combinatorics, and correlations of multiplicative functions
www.nsf.gov
July 31, 2025 at 10:44 PM
do tell?
July 8, 2025 at 10:20 PM
Reposted by cohenicsection
So within six months of this, he was dead
Gerry Connolly defeats AOC to become top Democrat on Oversight Committee
Rep. Gerry Connolly of Virginia won election to serve as the top Democrat on the House Oversight Committee, defeating Rep. Alexandria Ocasio-Cortez.
www.cbsnews.com
May 21, 2025 at 1:10 PM
another win for the algebra failsons, fuck it degree of a coherent sheaf is the the degree of the determinant sheaf. Fuck it they're all vector bundles
April 21, 2025 at 10:38 PM
Minkowski's theorem (on symmetric convex bodies and lattice points)?
April 16, 2025 at 1:30 PM
Sorry, the metaplectic group is just a double cover. No Whitehead tower shenanigans here. It's interesting though, spin geometry is traditionally fruitful as a geometric theory because the universal cover of GL^+(n, R) has no faithful finite dimensional reps while Spin(n) does.
April 10, 2025 at 9:05 PM
When you've done all this, the next step is defining symplectic dirac operators. The corresponding heat kernel should encode symplectic invariants as coefficients of its asymptotic expansion as a pseudodifferential operator?
April 10, 2025 at 9:02 PM
But Weyl algebras have no finite dimensional representations: the canonical commutation relation cannot be satisfied by finite rank matrices. Indeed, 0 = Tr([x,p]) = Tr(id) = dim V in finite dim. So you necessarily need to move to the setting of Banach bundles (in particular L²(E)) for such geometry
April 10, 2025 at 8:57 PM
In symplectic spin geometry, one considers a principal metaplectic group (universal cover of Symp(n)) bundle covering of the symplectic frame bundle. This endows E->M with the structure of a Weyl(E)-module. Weyl(R^n) is the symplectic deformation of the exterior algebra.
April 10, 2025 at 8:53 PM