Mathematics
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C. Ding
  • Member for 6 years, 3 months
  • Last seen more than a month ago
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a counter-example for the existence of the direct limits in $\mathbf{Ban}$
6
If $AT=TA$ with $A\geq0$. Why $A^{1/2}T=TA^{1/2}$?
5
How to show $f$ is non-negative.
5
$p$ is irreducible in $\mathbb Z_n$ if and only if $p^2$ divides $n$.

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