Mathematics
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Jochen's user avatar
Jochen's user avatar
Jochen
  • Member for 10 years, 7 months
  • Last seen this week
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11,417
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157k
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369
answers
20
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655
Score
340
Posts
87
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131
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68
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17
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90
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50
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13
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46
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12
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81
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49
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69
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28
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7
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Top posts
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All Questions Answers
Score Newest
answer
16
Finite dimensional subspace of $C([0,1])$
Mar 26, 2014
question
15
Spectral theorem for unbounded self-adjoint operators on REAL Hilbert spaces
Jan 14, 2014
answer
12
Prove the set of sequences $c_0$ which converge to zero in $l_{\infty}$ is closed.
Mar 11, 2014
answer
12
Can we prove the chain rule without using an artificial trick?
Nov 20, 2022
answer
11
If $f(x) + f'(x) + f''(x) \to A$ as $x \to \infty$, then show that $f(x) \to A$ as $x \to \infty$
Mar 25, 2014
answer
11
Question about sum of l'p spaces
Aug 31, 2013
answer
10
If $T: X \to Y$ is norm-norm continuous then it is weak-weak continuous
Aug 19, 2014
answer
10
If $M=M^{\perp\perp}$ for every closed subspace $M$ of a pre-Hilbert space then $H$ is complete
Jan 18, 2022
question
9
How much bigger is the power set -- explicitly
Dec 1, 2019
answer
9
Topologies of test functions and distributions
Mar 10, 2014
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55
Is every sigma-algebra the Borel algebra of a topology?
33
Did ancient mathematicians know Euler's characteristic for convex polyhedra?
32
Hahn-Banach theorem with convex majorant
27
Is a normed space which is homeomorphic to a Banach space complete?
21
Are weak and strong convergence of sequences not equivalent?

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