Question

Why does a matrix PDE $ \hat{M}_{ij}(t) v_j(t) = 0$ imply $| \hat{M}_{ij}(t) | (v_1(t)+v_2(t)+\dots) = 0$?

score 61 · Answer 1 · 2026-04-16 13:31:50

61

Views

Why does a matrix PDE $ \hat{M}_{ij}(t) v_j(t) = 0$ imply $| \hat{M}_{ij}(t) | (v_1(t)+v_2(t)+\dots) = 0$?

Published on 16 Apr 2026 - 13:31

score 45 · Answer 2 · 2026-04-12 01:37:43

45

Views

3b1b video: why does this linear combination not seem to follow the rules of REFF to derive x and y values?

Published on 12 Apr 2026 - 1:37

score 87 · Answer 3 · 2026-04-10 18:28:32

87

Views

Block matrix operations, positive semidefinite

Published on 10 Apr 2026 - 18:28

score 89 · Answer 4 · 2026-04-14 20:09:55

89

Views

Solving for a Diagonal Positive Definite Matrix: $\Delta$ such that $b'\Delta C'(C\Delta C')^{-1}=a'DC'(CDC')^{-1}$

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score 37 · Answer 5 · 2026-04-11 03:28:16

37

Views

How do free variables become a constant that represents all span of a vector?

Published on 11 Apr 2026 - 3:28

score 56 · Answer 6 · 2026-04-15 13:31:20

56

Views

Solutions to "quadratic" type matrix equation, $\Big(\mathrm{trace}(X^TP) I + Q\Big)X = Q$?

Published on 15 Apr 2026 - 13:31

score 90 · Answer 7 · 2026-04-15 07:41:12

90

Views

Solving matrix equation $ A X - 3 \left( A^T A^{-1} \right)^{-1} = A $

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score 38 · Answer 8 · 2026-04-11 08:57:51

38

Views

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Published on 11 Apr 2026 - 8:57

score 42 · Answer 9 · 2026-04-15 21:52:58

42

Views

Solving Matrix Equation $(A^T)^{-1}X+(\frac12B)^{-1}=(B^{-1}A^T)^{-1}$

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score 61 · Answer 10 · 2026-04-16 11:40:18

61

Views

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Published on 16 Apr 2026 - 11:40

score 53 · Answer 11 · 2026-04-10 02:05:36

53

Views

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score 692 · Answer 12 · 2026-04-12 17:53:35

692

Views

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Published on 12 Apr 2026 - 17:53

score 48 · Answer 13 · 2026-04-29 16:16:55

48

Views

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Published on 29 Apr 2026 - 16:16

score 665 · Answer 14 · 2026-04-14 06:14:04

665

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Published on 14 Apr 2026 - 6:14

score 105 · Answer 15 · 2026-04-16 18:02:19

105

Views

Lower bound for $\| (I+A)^{-1} - (I+B)^{-1}\|$ where $A, B \ge 0$

Published on 16 Apr 2026 - 18:02

List Question

Why does a matrix PDE $ \hat{M}_{ij}(t) v_j(t) = 0$ imply $| \hat{M}_{ij}(t) | (v_1(t)+v_2(t)+\dots) = 0$?

3b1b video: why does this linear combination not seem to follow the rules of REFF to derive x and y values?

Block matrix operations, positive semidefinite

Solving for a Diagonal Positive Definite Matrix: $\Delta$ such that $b'\Delta C'(C\Delta C')^{-1}=a'DC'(CDC')^{-1}$

How do free variables become a constant that represents all span of a vector?

Solutions to "quadratic" type matrix equation, $\Big(\mathrm{trace}(X^TP) I + Q\Big)X = Q$?

Solving matrix equation $ A X - 3 \left( A^T A^{-1} \right)^{-1} = A $

minimizing $\|A\| + \mathrm{trace}(Q(A^TA - 2A))$

Solving Matrix Equation $(A^T)^{-1}X+(\frac12B)^{-1}=(B^{-1}A^T)^{-1}$

Simplify analytical expression that contains pseudoinverse and non-square matrices

Simple Matrix Equation.

Finding the basis vector of null space, how?

How to write the distance matrix of a matrix in a matrix algebra form?

Solving a linear system of matrix equations in GF(2) using Sage

Lower bound for $\| (I+A)^{-1} - (I+B)^{-1}\|$ where $A, B \ge 0$

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