Question

Can a matrix not admitting an LU decomposition be shifted so that it does admit an LU decomposition?

score 22 · Answer 1 · 2026-03-25 11:05:13

22

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Can a matrix not admitting an LU decomposition be shifted so that it does admit an LU decomposition?

Published on 25 Mar 2026 - 11:05

score 22 · Answer 2 · 2026-04-12 18:00:59

22

Views

Galois group of composition contains direct product of certain Galois group

Published on 12 Apr 2026 - 18:00

score 22 · Answer 3 · 2026-04-11 21:06:27

22

Views

Symbolic trigonometry tool for graphically entered triangles

Published on 11 Apr 2026 - 21:06

score 22 · Answer 4 · 2026-04-12 13:46:16

22

Views

some manual calculations

Published on 12 Apr 2026 - 13:46

score 22 · Answer 5 · 2026-04-15 10:27:27

22

Views

Given two vectors $a$ and $b$ prove their distance is $2\sum_{i=1}^{n} (a_i + t_p h_i) h_i$

Published on 15 Apr 2026 - 10:27

score 22 · Answer 6 · 2026-04-16 22:56:59

Finding a sequence $a_{n}$ and $b_{n}$ where $a_{n}$ converges and $b_{n}$ is unbounded, and $a_{n}b_{n}$ converges

score 22 · Answer 7 · 2026-04-14 01:28:05

22

Views

Is $\sum_{i=1}^n [-1-x_i e^{-\alpha}]=0$ solvable analytically or numerically for $\alpha$?

Published on 14 Apr 2026 - 1:28

score 22 · Answer 8 · 2026-04-09 17:44:04

22

Views

Can $v$ be a linear combination of nonzero independent vectors it is orthogonal to?

Published on 09 Apr 2026 - 17:44

score 22 · Answer 9 · 2026-04-14 05:23:58

22

Views

Investor estimates a fortune "t" years from now, show initial growth rate

Published on 14 Apr 2026 - 5:23

score 22 · Answer 10 · 2026-04-16 10:11:48

22

Views

Recurrence relation - Show that there is $A$ s.t. $a_n < A \forall n \in N$

Published on 16 Apr 2026 - 10:11

score 22 · Answer 11 · 2026-04-09 21:44:32

22

Views

how to calculate the optimal string to match a pass sequence

Published on 09 Apr 2026 - 21:44

score 22 · Answer 12 · 2026-04-15 17:00:19

22

Views

How can we prove that for every $\alpha,$ $\alpha \in aut(\mathbb Q)$ has the form $\alpha(x)=x\alpha(1)?$

Published on 15 Apr 2026 - 17:00

score 22 · Answer 13 · 2026-04-12 16:02:48

22

Views

Apparent vicious cycle for compactness of a sphere in FDVS

Published on 12 Apr 2026 - 16:02

score 22 · Answer 14 · 2026-04-13 12:50:34

22

Views

Subring such that all products are zero

Published on 13 Apr 2026 - 12:50

score 22 · Answer 15 · 2026-04-16 03:37:12

22

Views

The map $G$ from a solid of revolution $M$ to a set of its unit normals isn't injective

Published on 16 Apr 2026 - 3:37

List Question

Can a matrix not admitting an LU decomposition be shifted so that it does admit an LU decomposition?

Galois group of composition contains direct product of certain Galois group

Symbolic trigonometry tool for graphically entered triangles

some manual calculations

Given two vectors $a$ and $b$ prove their distance is $2\sum_{i=1}^{n} (a_i + t_p h_i) h_i$

Finding a sequence $a_{n}$ and $b_{n}$ where $a_{n}$ converges and $b_{n}$ is unbounded, and $a_{n}b_{n}$ converges

Is $\sum_{i=1}^n [-1-x_i e^{-\alpha}]=0$ solvable analytically or numerically for $\alpha$?

Can $v$ be a linear combination of nonzero independent vectors it is orthogonal to?

Investor estimates a fortune "t" years from now, show initial growth rate

Recurrence relation - Show that there is $A$ s.t. $a_n < A \forall n \in N$

how to calculate the optimal string to match a pass sequence

How can we prove that for every $\alpha,$ $\alpha \in aut(\mathbb Q)$ has the form $\alpha(x)=x\alpha(1)?$

Apparent vicious cycle for compactness of a sphere in FDVS

Subring such that all products are zero

The map $G$ from a solid of revolution $M$ to a set of its unit normals isn't injective

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