Question

Cross Product Index Notation Proof - Do not understand step

score 161 · Answer 1 · 2026-03-25 01:15:04

161

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Cross Product Index Notation Proof - Do not understand step

Published on 25 Mar 2026 - 1:15

score 1.3k · Answer 2 · 2019-09-02 23:29:27

1.3k

Views

Regular octagons and diagonals proof

Published on 02 Sep 2019 - 23:29

score 1k · Answer 3 · 2026-04-10 21:05:08

1k

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How can I evaluate the sum $\sum_{k=1}^{n} k^2 2^k$?

Published on 10 Apr 2026 - 21:05

score 54 · Answer 4 · 2026-03-29 20:04:52

54

Views

If $\{h_n\}_1^\infty$ is weakly convergent then $\sup_{n\in \mathbb{N}}\|h_n\| < \infty$,

Published on 29 Mar 2026 - 20:04

score 252 · Answer 5 · 2026-04-02 04:51:53

252

Views

Induction: Prove that $(A_{1}A_{2}..A_{n-1}A_{n})^{T} = A_{n}^{T}A_{n-1}^{T}..A_{2}^{T}A_{1}^{T}$

Published on 02 Apr 2026 - 4:51

score 164 · Answer 6 · 2026-03-26 06:31:56

164

Views

Let $x$ be a number of the Cantor set, determine the interval to which $x$ belongs.

Published on 26 Mar 2026 - 6:31

score 169 · Answer 7 · 2026-04-03 18:24:12

169

Views

Convergence and divergence of power series

Published on 03 Apr 2026 - 18:24

score 304 · Answer 8 · 2019-09-04 19:49:12

304

Views

Why is the proof that $\sqrt2$ is irrational must $p$ and $q$ be coprime?

Published on 04 Sep 2019 - 19:49

score 910 · Answer 9 · 2026-03-28 10:03:48

910

Views

Proving the Pigeonhole Principle using proof by contradiction

Published on 28 Mar 2026 - 10:03

score 20 · Answer 10 · 2026-04-09 05:34:30

20

Views

Explanation of a step in a solution.

Published on 09 Apr 2026 - 5:34

score 248 · Answer 11 · 2026-04-11 03:30:32

248

Views

Understanding the proof of Jordan normal form, by matrix trick

Published on 11 Apr 2026 - 3:30

score 1.1k · Answer 12 · 2026-04-09 08:27:54

1.1k

Views

deformation retraction of the torus with 1 pt. deleted onto 2 circles intersecting at a pt. and that of $\mathbb R^n \setminus \{0\}$ onto $S^{n-1}$.

Published on 09 Apr 2026 - 8:27

score 1k · Answer 13 · 2026-04-10 22:35:41

1k

Views

Every interval is measurable.

Published on 10 Apr 2026 - 22:35

score 36 · Answer 14 · 2026-03-26 08:02:24

36

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Initial Value Problem $\frac{dx}{dt}=f(t,x),x(\tau)=\xi$ Equivalent to Integral Equation $x(t)=\xi+\int_{\tau}^{t}f(s,x(s))ds$.

Published on 26 Mar 2026 - 8:02

score 243 · Answer 15 · 2019-09-05 20:39:24

243

Views

Dummit & Foote, $\langle g\rangle \leq C_G(g)$ for any $g \in G$.

Published on 05 Sep 2019 - 20:39

List Question

Cross Product Index Notation Proof - Do not understand step

Regular octagons and diagonals proof

How can I evaluate the sum $\sum_{k=1}^{n} k^2 2^k$?

If $\{h_n\}_1^\infty$ is weakly convergent then $\sup_{n\in \mathbb{N}}\|h_n\| < \infty$,

Induction: Prove that $(A_{1}A_{2}..A_{n-1}A_{n})^{T} = A_{n}^{T}A_{n-1}^{T}..A_{2}^{T}A_{1}^{T}$

Let $x$ be a number of the Cantor set, determine the interval to which $x$ belongs.

Convergence and divergence of power series

Why is the proof that $\sqrt2$ is irrational must $p$ and $q$ be coprime?

Proving the Pigeonhole Principle using proof by contradiction

Explanation of a step in a solution.

Understanding the proof of Jordan normal form, by matrix trick

deformation retraction of the torus with 1 pt. deleted onto 2 circles intersecting at a pt. and that of $\mathbb R^n \setminus \{0\}$ onto $S^{n-1}$.

Every interval is measurable.

Initial Value Problem $\frac{dx}{dt}=f(t,x),x(\tau)=\xi$ Equivalent to Integral Equation $x(t)=\xi+\int_{\tau}^{t}f(s,x(s))ds$.

Dummit & Foote, $\langle g\rangle \leq C_G(g)$ for any $g \in G$.

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