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Mathematics
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khashayar's user avatar
khashayar's user avatar
khashayar
  • Member for 2 years, 8 months
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question
13
On the properties of sum-of-squares polynomials
Jun 1, 2022
question
6
Is the set of the upper Riemann sums convex for an arbitrary bounded function $f(x)$?
Jan 7, 2022
question
5
Unitary operators and a product of reflections
Nov 10, 2023
question
5
Does the question that every group of order 77 must have an element of order 7 and an element of order 11 have an elementary proof
May 30, 2022
question
5
Prove a particular subset of a group is closed under inverse
Jul 21, 2022
question
5
Associativity of tensor product for (bi)modules
Aug 14, 2023
answer
4
Finding and counting integer solutions to $0 \leq a^2 - b^2 -4ab \leq 2b^2 - 2a^2 -2ab \leq a^2 + b^2$
Jan 17, 2022
question
4
Number of elements with order $2$ in a finite abelian group
May 26, 2022
question
4
Let $G$ be a group, $H < G$, and $A_H=\{g\mid\bar{g}\subset H\}$ where $\bar{g}$ is the conjugacy class of $g$. Prove $A_H\lhd G$.
Jul 30, 2022
question
4
number of distinct commutators and the cardinality of the center of a group
Feb 7, 2023