Mathematics
C. Ding's user avatar
C. Ding's user avatar
C. Ding's user avatar
C. Ding
  • Member for 7 years, 9 months
  • Last seen this week
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All Questions Answers
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question
7
No community promotion ads any longer?
Oct 27
answer
6
Community Ads for 2021
Jun 23, 2021
answer
2
Mathematics new site theme is live
Aug 10, 2018
Top network posts
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7
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
Show that continuous functions preserve sequence convergence in topological spaces
5
$p$ is irreducible in $\mathbb Z_n$ if and only if $p^2$ divides $n$.

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