Question

How to prove positive semi-definiteness or integral inequality

score 103 · Answer 1 · 2026-03-25 01:36:11

103

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How to prove positive semi-definiteness or integral inequality

Published on 25 Mar 2026 - 1:36

score 72 · Answer 2 · 2026-03-22 21:48:32

72

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Is there any specific relationship among the determinant of leading principal submatrices of a tridiagonal matrix?

Published on 22 Mar 2026 - 21:48

score 143 · Answer 3 · 2018-08-09 15:32:00

If $ax^2_1+by^2_1+cz^2_1=ax^2_2+by^2_2+cz^2_2=ax^2_3+by^2_3+cz^2_3=d$ and $ax_2x_3+by_2y_3+cz_2z_3=ax_3x_1+by_3y_1+cz_3z_1=ax_1x_2+by_1y_2+cz_1z_2=f$,

score 75 · Answer 4 · 2018-08-09 15:50:38

75

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If $a_1, \ldots ,a_9$ are in harmonic progression, then find the value of the determinant

Published on 09 Aug 2018 - 15:50

score 3.1k · Answer 5 · 2026-03-26 02:46:54

3.1k

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When does trace and determinant of a 2 x 2 matrix equal each other? (Linear Algebra)

Published on 26 Mar 2026 - 2:46

score 674 · Answer 6 · 2018-08-10 15:20:37

674

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Over a commutative unital ring, does $\det A = 0$ imply that $A\mathbf{x} = 0$ has a non-zero solution?

Published on 10 Aug 2018 - 15:20

score 2.1k · Answer 7 · 2026-03-25 21:31:30

2.1k

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What is the physical significance of the determinants of orthogonal matrices having the value of $\pm 1$?

Published on 25 Mar 2026 - 21:31

score 162 · Answer 8 · 2018-08-13 19:19:41

162

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Find all values of $x$ where the determinant equals 0

Published on 13 Aug 2018 - 19:19

score 131 · Answer 9 · 2026-03-25 06:24:32

131

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Determinant does not vanish on an open subset.

Published on 25 Mar 2026 - 6:24

score 1.4k · Answer 10 · 2026-03-26 09:37:10

1.4k

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Proof matrix inverse exists if determinant is different from zero

Published on 26 Mar 2026 - 9:37

score 761 · Answer 11 · 2026-03-26 07:58:27

761

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$AB-BA=A^k$, then $A$ is not invertible

Published on 26 Mar 2026 - 7:58

score 588 · Answer 12 · 2018-08-14 20:59:50

588

Views

Problem on Determinant.

Published on 14 Aug 2018 - 20:59

score 59 · Answer 13 · 2018-08-15 02:45:18

59

Views

How to solve this? Advice?

Published on 15 Aug 2018 - 2:45

score 529 · Answer 14 · 2026-03-25 12:37:17

529

Views

Prove that : There exists a vector $x$ such that $Mx = x$ , where $M$ is a Markov matrix

Published on 25 Mar 2026 - 12:37

score 986 · Answer 15 · 2018-08-15 06:38:59

986

Views

Is there any condition for a 2x2 system of equations to have a positive solution?

Published on 15 Aug 2018 - 6:38

List Question

How to prove positive semi-definiteness or integral inequality

Is there any specific relationship among the determinant of leading principal submatrices of a tridiagonal matrix?

If $ax^2_1+by^2_1+cz^2_1=ax^2_2+by^2_2+cz^2_2=ax^2_3+by^2_3+cz^2_3=d$ and $ax_2x_3+by_2y_3+cz_2z_3=ax_3x_1+by_3y_1+cz_3z_1=ax_1x_2+by_1y_2+cz_1z_2=f$,

If $a_1, \ldots ,a_9$ are in harmonic progression, then find the value of the determinant

When does trace and determinant of a 2 x 2 matrix equal each other? (Linear Algebra)

Over a commutative unital ring, does $\det A = 0$ imply that $A\mathbf{x} = 0$ has a non-zero solution?

What is the physical significance of the determinants of orthogonal matrices having the value of $\pm 1$?

Find all values of $x$ where the determinant equals 0

Determinant does not vanish on an open subset.

Proof matrix inverse exists if determinant is different from zero

$AB-BA=A^k$, then $A$ is not invertible

Problem on Determinant.

How to solve this? Advice?

Prove that : There exists a vector $x$ such that $Mx = x$ , where $M$ is a Markov matrix

Is there any condition for a 2x2 system of equations to have a positive solution?

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