Question

Finding an open neighborhood in the domain of a continuous map whose image is contained in an open neighborhood in its codomain

score 211 · Answer 1 · 2019-03-02 00:29:25

211

Views

Finding an open neighborhood in the domain of a continuous map whose image is contained in an open neighborhood in its codomain

Published on 02 Mar 2019 - 0:29

score 97 · Answer 2 · 2026-03-25 05:09:43

97

Views

Infinite differentiability for a solution of the general linear parabolic pde of second order

Published on 25 Mar 2026 - 5:09

score 22 · Answer 3 · 2019-03-03 16:45:21

22

Views

Multivariable calculus: question on proof

Published on 03 Mar 2019 - 16:45

score 195 · Answer 4 · 2026-03-31 10:04:22

195

Views

Prime avoidance lemma (from Eisenbud)

Published on 31 Mar 2026 - 10:04

score 90 · Answer 5 · 2019-03-04 02:43:27

90

Views

$\forall x \in Z $ such that $ x^2 -x \ge 0$

Published on 04 Mar 2019 - 2:43

score 941 · Answer 6 · 2026-04-03 14:49:18

941

Views

Eilenberg-Watts Theorem Proof

Published on 03 Apr 2026 - 14:49

score 96 · Answer 7 · 2026-02-23 07:39:37

96

Views

Proving a lemma for a dichotomy

Published on 23 Feb 2026 - 7:39

score 94 · Answer 8 · 2026-03-30 08:33:05

94

Views

If $f$ is closed and convex then $f = f^{**}$ proof question.

Published on 30 Mar 2026 - 8:33

score 115 · Answer 9 · 2026-03-27 13:42:17

115

Views

Unnecessary finite dimensionality requirement in Theorem 5.1.8 of Sweedler’s “Hopf Algebras”

Published on 27 Mar 2026 - 13:42

score 420 · Answer 10 · 2019-03-05 02:22:52

420

Views

Showing the composition of invertible functions $g \circ f$ is invertible with inverse $f^{-1} \circ g^{-1}$

Published on 05 Mar 2019 - 2:22

score 72 · Answer 11 · 2019-03-05 12:00:55

72

Views

Basic Probability Theory: establish $(a, b) = \bigcup_{n=1}^{\infty}\left(a, b - \frac{1}{n}\right]$

Published on 05 Mar 2019 - 12:00

score 224 · Answer 12 · 2019-03-05 20:30:52

224

Views

Dense subset of metric spaces and how to show completion.

Published on 05 Mar 2019 - 20:30

score 65 · Answer 13 · 2026-03-25 17:41:52

65

Views

How is the homomorphism $b: LC_n(Y) \to LC_{n+1}(Y)$ where $b[w_0\cdots w_n] \mapsto [bw_0\cdots w_n]$ well-defined?

Published on 25 Mar 2026 - 17:41

score 36 · Answer 14 · 2026-03-27 16:46:29

36

Views

Help understanding a lemma on modules over a PID.

Published on 27 Mar 2026 - 16:46

score 57 · Answer 15 · 2019-03-06 02:07:14

57

Views

Discrete mathematics Proof (∃y ∈ A, P y) ∨ (∃y ∈ A, Qy) =⇒ ∃x ∈ A, P x ∨ Qx with coq or by hand

Published on 06 Mar 2019 - 2:07

List Question

Finding an open neighborhood in the domain of a continuous map whose image is contained in an open neighborhood in its codomain

Infinite differentiability for a solution of the general linear parabolic pde of second order

Multivariable calculus: question on proof

Prime avoidance lemma (from Eisenbud)

$\forall x \in Z $ such that $ x^2 -x \ge 0$

Eilenberg-Watts Theorem Proof

Proving a lemma for a dichotomy

If $f$ is closed and convex then $f = f^{**}$ proof question.

Unnecessary finite dimensionality requirement in Theorem 5.1.8 of Sweedler’s “Hopf Algebras”

Showing the composition of invertible functions $g \circ f$ is invertible with inverse $f^{-1} \circ g^{-1}$

Basic Probability Theory: establish $(a, b) = \bigcup_{n=1}^{\infty}\left(a, b - \frac{1}{n}\right]$

Dense subset of metric spaces and how to show completion.

How is the homomorphism $b: LC_n(Y) \to LC_{n+1}(Y)$ where $b[w_0\cdots w_n] \mapsto [bw_0\cdots w_n]$ well-defined?

Help understanding a lemma on modules over a PID.

Discrete mathematics Proof (∃y ∈ A, P y) ∨ (∃y ∈ A, Qy) =⇒ ∃x ∈ A, P x ∨ Qx with coq or by hand

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