Question

Sketching a phase portrait and proving it has no periodic orbits

score 706 · Answer 1 · 2026-04-13 22:57:50

706

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Sketching a phase portrait and proving it has no periodic orbits

Published on 13 Apr 2026 - 22:57

score 67 · Answer 2 · 2026-04-17 07:52:30

67

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Find all $m\in\mathbb{R}$ such that $x^4+x^3-2x^2+3mx-m^2=0$ has only real roots.

Published on 17 Apr 2026 - 7:52

score 621 · Answer 3 · 2026-04-09 13:07:39

621

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Geometric Proof of Perron-Frobenius II

Published on 09 Apr 2026 - 13:07

score 422 · Answer 4 · 2026-04-11 20:21:28

422

Views

A spanning set that is not linearly independent

Published on 11 Apr 2026 - 20:21

score 111 · Answer 5 · 2026-04-16 04:19:16

111

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I am trying to prove how is $i^2 = -1$

Published on 16 Apr 2026 - 4:19

score 169 · Answer 6 · 2026-04-29 12:25:13

169

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Find the real values of $x$ that satisfy the equation $7[x]+23\{x\}=191$

Published on 29 Apr 2026 - 12:25

score 64 · Answer 7 · 2026-04-11 17:45:53

64

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Question on Eigen Decomposition

Published on 11 Apr 2026 - 17:45

score 2.2k · Answer 8 · 2026-04-16 06:31:24

Let S be a linearly independent set in a finite dimensional vector space V . Prove that S can be enlarged to give a basis for V .

score 28 · Answer 9 · 2026-04-14 08:56:25

28

Views

Intersection of an ideal with a subset

Published on 14 Apr 2026 - 8:56

score 101 · Answer 10 · 2026-04-15 09:05:28

101

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Find a decomposition of vector space as direct sum of five modules

Published on 15 Apr 2026 - 9:05

score 260 · Answer 11 · 2026-04-14 10:32:48

260

Views

How to prove the positive-definiteness of a symmetric Toeplitz matrix like it?

Published on 14 Apr 2026 - 10:32

score 47 · Answer 12 · 2026-04-16 08:56:40

Let $T : V\rightarrow V$ a linear map, where $\dim V=2$. Then there exist $a_1-a_5 \in \Bbb R$, not all $0$, s.t $a_1T +… + a_4T^4 = a_5I_V$ .

score 72 · Answer 13 · 2026-03-26 12:36:44

72

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Can I solve a system of massive linear equations faster if I know the solution to a system with the same matrix $A$.

Published on 26 Mar 2026 - 12:36

score 1.1k · Answer 14 · 2026-04-09 11:25:17

1.1k

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Finding Jordan Basis of a nilpotent matrix

Published on 09 Apr 2026 - 11:25

score 113 · Answer 15 · 2026-04-09 18:59:38

113

Views

How do I visualize a non-unique least-squares solution?

Published on 09 Apr 2026 - 18:59

List Question

Sketching a phase portrait and proving it has no periodic orbits

Find all $m\in\mathbb{R}$ such that $x^4+x^3-2x^2+3mx-m^2=0$ has only real roots.

Geometric Proof of Perron-Frobenius II

A spanning set that is not linearly independent

I am trying to prove how is $i^2 = -1$

Find the real values of $x$ that satisfy the equation $7[x]+23\{x\}=191$

Question on Eigen Decomposition

Let S be a linearly independent set in a finite dimensional vector space V . Prove that S can be enlarged to give a basis for V .

Intersection of an ideal with a subset

Find a decomposition of vector space as direct sum of five modules

How to prove the positive-definiteness of a symmetric Toeplitz matrix like it?

Let $T : V\rightarrow V$ a linear map, where $\dim V=2$. Then there exist $a_1-a_5 \in \Bbb R$, not all $0$, s.t $a_1T +… + a_4T^4 = a_5I_V$ .

Can I solve a system of massive linear equations faster if I know the solution to a system with the same matrix $A$.

Finding Jordan Basis of a nilpotent matrix

How do I visualize a non-unique least-squares solution?

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