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Feb
8
awarded  Popular Question
Feb
4
reviewed Approve Why do differential forms and integrands have different transformation behaviours under diffeomorphisms?
Jan
30
awarded  Notable Question
Jan
22
revised Confused by the Bolzano Weierstrass Theorem
edited body
Jan
9
awarded  Good Question
Nov
16
revised sigma algebra generated by random variable
deleted 1 character in body
Sep
16
reviewed Approve Does a Fourier series always have period $2\pi$?
Sep
7
comment internal ext of module spectra
I don't think the category of $E$-module spectra is abelian. It's homotopy category is triangulated though. One can then define derived functors with respect to a given homological ideal.
Aug
13
revised Find $P(X<Y<1)$ probability of two-dimensional density function
added 1 character in body
Jul
30
awarded  Notable Question
Jul
28
awarded  Yearling
Jul
25
awarded  abstract-algebra
Jul
24
answered Prove $K\cong S_3$
Jul
24
answered Derivative with respect to $y'$ in the Euler-Lagrange differential equation
Jun
27
comment Homology of $S^2/x\sim -x$ for $x$ on the equator
What are $P^i$?
Jun
17
revised realizing/ understanding $C^*(\phi_g(C([0,1])))$ and "support projection of an element of a $C^*$-algebra
added 63 characters in body
Jun
3
answered Bott projection
Jun
2
comment universal C* algebras
Interestingly, the universal Cstar algebra generated by a partial isometry is apparently quite horrible: ams.org/journals/proc/2012-140-01/S0002-9939-2011-10988-2/…
May
29
revised Why is the 3D case so rich?
added 1 character in body
May
28
awarded  Nice Answer