Mathematics
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tkf
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All Questions Answers
Score Newest
answer
36
Are all finite-dimensional algebras of a fixed dimension over a field isomorphic to one another?
Jul 14, 2020
answer
15
$6!\cdot 7!=10!$. Is there a natural bijection between $S_6\times S_7$ and $S_{10}$?
Nov 29, 2020
answer
13
Wrong but fun and/or useful "proofs" in linear algebra
Apr 17
answer
11
Solving the complex equation $(1+z)^5=z^5$
Aug 4, 2020
answer
10
Is it possible to tile a $13 \times 13$ board with $4 \times 1$ dominoes such that the center square is left untiled?
Sep 9, 2020
answer
10
Normal subgroup of a characteristic subgroup
Sep 16, 2021
answer
9
What is $\pi_3(S^2\times S^1)$?
Nov 29, 2021
answer
8
Alternating sum involving reciprocals of powers of primes equals $\ln(\frac{\pi}{4})$
Sep 21, 2021
answer
7
Does the category of local rings with residue field $F$ have an initial object?
May 16, 2020
answer
7
Solving $x^{100}− y^{100 }= 100!$
Sep 3, 2020
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