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tkw
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answer
3
Exact sequence of $R$-modules implies sequence of submodules is exact
Sep 19
answer
3
characterization of Schur functions
Nov 9
answer
2
Find $UAV = \begin{bmatrix} I_r &0\\0&0 \end{bmatrix} $ such that $U,V$ are invertible, where $r$ is A's rank.
Sep 18
answer
2
Rotating "Witch of Agnesi" about the y-axis (volume of rotation) - Calculus
Sep 30
answer
2
Geometry question involving a sparsely-related tangent condition
Oct 4
answer
2
Prove the polynomials are orthogonal
Nov 12
answer
2
Connection between number of "ascents" and "progressive elements" in permutations
Nov 13
answer
2
If $\overline{\varphi}: M/IM\to N/IN$ is surjective, then $\varphi: M \to N$ is surjective (without Nakayama)
Nov 21
question
1
Show two definitions of open subfunctors are equivalent
Sep 10
answer
1
Solving $Ax=0$ with column-deleted determinants
Sep 18