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cnikbesku
  • Member for 3 years, 9 months
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  • Kingbezdom
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4
When does a short exact sequence of abelian groups with $B\cong A\oplus C$ split?
Oct 30
question
3
How powerful are sequences of Steiner symmetrizations?
May 16
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10
Can $\mathbb{S}^2$ wind around $\mathbb{S}^2$ twice, just like you would wind $\mathbb{S}^1$ around $\mathbb{S}^1$ $n$ times
10
A non-zero function on $\mathbb{R}^n$ whose integral over any ball of radius $1$ is zero?
6
Why $P(z)\text{sin}(z)+Q(z)\text{cos}(z)$ has only finitely many non-real zeroes?
6
Are bilinear functionals continuous, in general?
6
Does such a weird convergent sequence exist?