Question

Holomorphic function maps circle onto $\mathbb{R}$ - constant?

score 37 · Answer 1 · 2026-04-16 09:33:36

37

Views

Holomorphic function maps circle onto $\mathbb{R}$ - constant?

Published on 16 Apr 2026 - 9:33

score 219 · Answer 2 · 2026-04-12 07:32:44

219

Views

Counterexample to Sobolev-embedding - Regularity of the boundary

Published on 12 Apr 2026 - 7:32

score 55 · Answer 3 · 2026-04-14 18:30:33

55

Views

Looking for counterexamples (non-domains)

Published on 14 Apr 2026 - 18:30

score 145 · Answer 4 · 2026-04-13 20:49:39

145

Views

A generalization of the law of large numbers.

Published on 13 Apr 2026 - 20:49

score 76 · Answer 5 · 2026-04-09 22:34:55

76

Views

Functions with "Unstable" Antiderivatives in Terms of Elementary Functions

Published on 09 Apr 2026 - 22:34

score 746 · Answer 6 · 2026-04-12 16:45:59

746

Views

Example of an isotropic sub-gaussian random vector with which concentration of the norm theorem does not hold

Published on 12 Apr 2026 - 16:45

score 78 · Answer 7 · 2026-04-24 11:24:43

78

Views

Join on preorder of natural numbers defined by division

Published on 24 Apr 2026 - 11:24

score 568 · Answer 8 · 2026-04-11 18:53:57

568

Views

Prove that any simplex is compact and convex.

Published on 11 Apr 2026 - 18:53

score 208 · Answer 9 · 2026-04-15 02:32:44

208

Views

Prove a proposition containing only the connective ∧,∨ is "monotonic"

Published on 15 Apr 2026 - 2:32

score 60 · Answer 10 · 2026-04-16 09:54:43

60

Views

If $H\le G$ for an abelian group $G$, then $r_p(H)+r_p(G/H)\ge r_p(G)$, where $r_p(K)$ is the $p$-rank of $K$.

Published on 16 Apr 2026 - 9:54

score 282 · Answer 11 · 2026-04-14 06:40:19

282

Views

Is the boundary of a $k$-manifold with corners a $(k-1)$-manifold with corners too?

Published on 14 Apr 2026 - 6:40

score 357 · Answer 12 · 2026-04-12 09:33:17

357

Views

What are your favourite examples in PDE? Which examples would you want to share with students in their first PDE course?

Published on 12 Apr 2026 - 9:33

score 52 · Answer 13 · 2026-04-12 23:06:54

52

Views

Counterexample to a recursive matched parenthesis proposition.

Published on 12 Apr 2026 - 23:06

score 119 · Answer 14 · 2026-04-16 03:57:37

119

Views

"Random" facts that math can prove (eg, there are at least 2 people on the planet with the exact same number of body hairs)

Published on 16 Apr 2026 - 3:57

score 92 · Answer 15 · 2026-04-15 15:17:17

92

Views

Tracial states on $M_n$ not being Trace

Published on 15 Apr 2026 - 15:17

List Question

Holomorphic function maps circle onto $\mathbb{R}$ - constant?

Counterexample to Sobolev-embedding - Regularity of the boundary

Looking for counterexamples (non-domains)

A generalization of the law of large numbers.

Functions with "Unstable" Antiderivatives in Terms of Elementary Functions

Example of an isotropic sub-gaussian random vector with which concentration of the norm theorem does not hold

Join on preorder of natural numbers defined by division

Prove that any simplex is compact and convex.

Prove a proposition containing only the connective ∧,∨ is "monotonic"

If $H\le G$ for an abelian group $G$, then $r_p(H)+r_p(G/H)\ge r_p(G)$, where $r_p(K)$ is the $p$-rank of $K$.

Is the boundary of a $k$-manifold with corners a $(k-1)$-manifold with corners too?

What are your favourite examples in PDE? Which examples would you want to share with students in their first PDE course?

Counterexample to a recursive matched parenthesis proposition.

"Random" facts that math can prove (eg, there are at least 2 people on the planet with the exact same number of body hairs)

Tracial states on $M_n$ not being Trace

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