Question

Concluding proof of Dirac's Theorem

score 1.1k · Answer 1 · 2018-05-31 21:49:04

1.1k

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Concluding proof of Dirac's Theorem

Published on 31 May 2018 - 21:49

score 618 · Answer 2 · 2026-03-25 12:48:37

618

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How to derive the representation formula from $\mathbb R^3$ to $\mathbb R^2$?

Published on 25 Mar 2026 - 12:48

score 299 · Answer 3 · 2026-03-26 11:17:56

299

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Given finitely many squares whose areas add up to $1$, show that they can be arranged without overlaps inside a square of area $2$.

Published on 26 Mar 2026 - 11:17

score 112 · Answer 4 · 2018-06-01 15:34:13

112

Views

Proof of chain rule: How can $\Delta u$ be $0$ when $\Delta x$ is positive?

Published on 01 Jun 2018 - 15:34

score 327 · Answer 5 · 2026-03-25 01:16:49

327

Views

Where is the hole in this argument asserting the constructibility of all regular polygons?

Published on 25 Mar 2026 - 1:16

score 69 · Answer 6 · 2026-03-25 10:58:47

69

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An indentity for $2$-tensors

Published on 25 Mar 2026 - 10:58

score 152 · Answer 7 · 2018-06-02 11:54:49

152

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Which definition should I use to prove $\bigcup_i A_i \times \bigcup_j B_j = \bigcup_{i, j}(A_i \times B_j)$

Published on 02 Jun 2018 - 11:54

score 351 · Answer 8 · 2026-03-25 14:32:26

351

Views

Slight generalization of the First Isomorphism Theorem

Published on 25 Mar 2026 - 14:32

score 299 · Answer 9 · 2026-03-23 06:44:15

299

Views

On Wedderburn's theorem for $\mathbb{k}$-algebras of finite dimension with $\mathbb{k}$ algebraically closed.

Published on 23 Mar 2026 - 6:44

score 234 · Answer 10 · 2018-06-04 09:59:44

234

Views

Measurable functions: $\sup f_n$ and $\limsup f_n$

Published on 04 Jun 2018 - 9:59

score 1.7k · Answer 11 · 2026-03-26 01:00:34

1.7k

Views

Proof of Inverse DFT

Published on 26 Mar 2026 - 1:00

score 60 · Answer 12 · 2026-03-25 04:43:22

60

Views

Can we make a suitable choice of y-axis in proving that any translation or rotation is the product of two reflections?

Published on 25 Mar 2026 - 4:43

score 98 · Answer 13 · 2018-06-05 05:01:45

98

Views

Is this proven by the generalized De Morgan's laws for propositional connectives?

Published on 05 Jun 2018 - 5:01

score 65 · Answer 14 · 2018-06-05 07:06:28

65

Views

Show that $f^{-1}(Y\setminus B_{1})=X\setminus f^{-1}(B_{1})$.

Published on 05 Jun 2018 - 7:06

score 106 · Answer 15 · 2026-03-28 16:04:36

106

Views

$\frac{2}{\lVert x \rVert^2} \langle x,u \rangle \langle x,v\rangle - \langle u, v\rangle \leq \lVert u \rVert \lVert v \rVert$?

Published on 28 Mar 2026 - 16:04

List Question

Concluding proof of Dirac's Theorem

How to derive the representation formula from $\mathbb R^3$ to $\mathbb R^2$?

Given finitely many squares whose areas add up to $1$, show that they can be arranged without overlaps inside a square of area $2$.

Proof of chain rule: How can $\Delta u$ be $0$ when $\Delta x$ is positive?

Where is the hole in this argument asserting the constructibility of all regular polygons?

An indentity for $2$-tensors

Which definition should I use to prove $\bigcup_i A_i \times \bigcup_j B_j = \bigcup_{i, j}(A_i \times B_j)$

Slight generalization of the First Isomorphism Theorem

On Wedderburn's theorem for $\mathbb{k}$-algebras of finite dimension with $\mathbb{k}$ algebraically closed.

Measurable functions: $\sup f_n$ and $\limsup f_n$

Proof of Inverse DFT

Can we make a suitable choice of y-axis in proving that any translation or rotation is the product of two reflections?

Is this proven by the generalized De Morgan's laws for propositional connectives?

Show that $f^{-1}(Y\setminus B_{1})=X\setminus f^{-1}(B_{1})$.

$\frac{2}{\lVert x \rVert^2} \langle x,u \rangle \langle x,v\rangle - \langle u, v\rangle \leq \lVert u \rVert \lVert v \rVert$?

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