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Mathematics
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fusheng
  • Member for 3 years, 5 months
  • Last seen this week
  • Lanzhou, China
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12
How to prove that $AB$ is a projection if $(AB)(BA)=AB$?
Jul 16, 2022
8
How to prove that $AB$ is a projection if $(AB)(BA)=AB$?
Jul 16, 2022
6
Eigenvalue of diagonally dominant matrices
Jul 26, 2023
5
Compute the character of an irreducible representation of $S_{20}$
Jul 1
4
A generalization of projection matrices in linear algebra
Jul 20, 2022
4
Need help with proof of property related to group rings.
Mar 25
4
Find a matrix $B=A^{2021}-5A^{2020}+2A^{2019}+5A^{2018}-3A^{2017}+A^2$
Jul 18, 2023
4
A question about Burnside normal p-complement theorem
Nov 28, 2022
4
A generalization of projection matrices in linear algebra
Jul 21, 2022
3
Matrix problems over a finite field
Jul 30, 2022
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14
On the finite sum of reciprocal Fibonacci sequences