Data Science
Babak Miraftab's user avatar
Babak Miraftab's user avatar
Babak Miraftab's user avatar
Babak Miraftab
  • Member for 3 years, 11 months
  • Last seen more than 1 year ago
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53
Example of a Borel set that is neither $F_\sigma$ nor $G_\delta$
27
Does $\sum\limits_{n=1}^\infty\frac{1}{\sqrt{n}+\sqrt{n+1}}$ converge?
24
Why does $PSL(2,\mathbb C)\cong PGL(2,\mathbb C)$ but $PSL(2,\mathbb R) \not\cong PGL(2,\mathbb R)$?
18
The limit of $\tan(n)$
17
Number of solutions of $x^2_1+\dots+x^2_n=0,$ $x_i\in \Bbb{F}_q.$