Question

Lipschitz constant for operator norm

score 916 · Answer 1 · 2026-03-27 00:00:01

916

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Lipschitz constant for operator norm

Published on 27 Mar 2026 - 0:00

score 108 · Answer 2 · 2020-03-25 04:46:45

108

Views

Any errors? My proof that if $\left(A - B\right) \cup \left(B - A\right) = A \cup B$, then $A \cap B = \emptyset$

Published on 25 Mar 2020 - 4:46

score 416 · Answer 3 · 2026-03-26 04:51:45

416

Views

Proof of consistency of propositional logic

Published on 26 Mar 2026 - 4:51

score 32 · Answer 4 · 2020-03-25 07:02:18

32

Views

Proof Verification: Proving the divisibility of an integer polynomial

Published on 25 Mar 2020 - 7:02

score 86 · Answer 5 · 2026-03-28 22:26:53

86

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Comparing the difference of floor functions with the difference of ceiling functions

Published on 28 Mar 2026 - 22:26

score 29 · Answer 6 · 2026-03-29 12:41:34

29

Views

question about uniformly continuity

Published on 29 Mar 2026 - 12:41

score 1k · Answer 7 · 2020-03-25 08:21:57

1k

Views

Solve the following system of equations by Cross Multiplication Method

Published on 25 Mar 2020 - 8:21

score 348 · Answer 8 · 2020-03-25 10:42:10

348

Views

Show that if $(x_n)$ is unbounded then $\exists$ subsequence $x_{n_{k}}$ such that $lim (1/x_{n_{k}})=0$

Published on 25 Mar 2020 - 10:42

score 375 · Answer 9 · 2026-02-23 11:25:36

375

Views

$\phi$ is a step function. Prove that $|\phi|$ is a step function

Published on 23 Feb 2026 - 11:25

score 104 · Answer 10 · 2026-03-26 12:35:49

104

Views

Boundedness of solution of second kind Volterra integral equation (Proof verification )

Published on 26 Mar 2026 - 12:35

score 51 · Answer 11 · 2020-03-25 15:12:26

51

Views

$(a_k)$ is a sequence with $|a_k|\le M$ for all k . Show that with $|x|\lt 1$ the series $f(x)=\sum_{k=1}^{\infty}a_{k}x^{k}$ converges.

Published on 25 Mar 2020 - 15:12

score 102 · Answer 12 · 2020-03-25 15:36:56

102

Views

A triangle with an angle of $60^\circ$ and side lengths $5$, $2x-3$, and $x+1$ ...

Published on 25 Mar 2020 - 15:36

score 120 · Answer 13 · 2026-03-27 17:40:27

120

Views

Sum of three power of seventh roots of unity form a regular 7 - gon inside a circle

Published on 27 Mar 2026 - 17:40

score 60 · Answer 14 · 2026-03-29 05:12:13

60

Views

Prove that, if $A, B \in M_{m × n}(K)$ then $A$ is equivalent to $I^{m, n}_r \iff rank(A)=r$, and $A$ is equivalent to $B$ iff their ranks are equal.

Published on 29 Mar 2026 - 5:12

score 61 · Answer 15 · 2020-03-25 17:01:08

61

Views

Complete measure space and measurable function.

Published on 25 Mar 2020 - 17:01

List Question

Lipschitz constant for operator norm

Any errors? My proof that if $\left(A - B\right) \cup \left(B - A\right) = A \cup B$, then $A \cap B = \emptyset$

Proof of consistency of propositional logic

Proof Verification: Proving the divisibility of an integer polynomial

Comparing the difference of floor functions with the difference of ceiling functions

question about uniformly continuity

Solve the following system of equations by Cross Multiplication Method

Show that if $(x_n)$ is unbounded then $\exists$ subsequence $x_{n_{k}}$ such that $lim (1/x_{n_{k}})=0$

$\phi$ is a step function. Prove that $|\phi|$ is a step function

Boundedness of solution of second kind Volterra integral equation (Proof verification )

$(a_k)$ is a sequence with $|a_k|\le M$ for all k . Show that with $|x|\lt 1$ the series $f(x)=\sum_{k=1}^{\infty}a_{k}x^{k}$ converges.

A triangle with an angle of $60^\circ$ and side lengths $5$, $2x-3$, and $x+1$ ...

Sum of three power of seventh roots of unity form a regular 7 - gon inside a circle

Prove that, if $A, B \in M_{m × n}(K)$ then $A$ is equivalent to $I^{m, n}_r \iff rank(A)=r$, and $A$ is equivalent to $B$ iff their ranks are equal.

Complete measure space and measurable function.

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