Question

How to prove that $\exists u_1\in P_n$ s.t $y[u_1]$ is minimal and there are finitely many $u_1=(g_1,...,g_n) \in \Bbb Z^n$ s.t $\gcd(g_1,...,g_n)=1$

score 37 · Answer 1 · 2026-03-24 20:15:39

How to prove that $\exists u_1\in P_n$ s.t $y[u_1]$ is minimal and there are finitely many $u_1=(g_1,...,g_n) \in \Bbb Z^n$ s.t $\gcd(g_1,...,g_n)=1$

score 1.4k · Answer 2 · 2026-03-22 20:10:42

1.4k

Views

Find k for Positive Definite Quadratic Form

Published on 22 Mar 2026 - 20:10

score 54 · Answer 3 · 2026-03-24 20:32:01

54

Views

If I add a positive definite matrix, do I increase the norm?

Published on 24 Mar 2026 - 20:32

score 1.8k · Answer 4 · 2026-03-17 03:34:04

1.8k

Views

Product of 2 positive definite matrix

Published on 17 Mar 2026 - 3:34

score 1.3k · Answer 5 · 2026-03-20 03:00:16

1.3k

Views

Optimization of the sum of a convex and a non-convex function?

Published on 20 Mar 2026 - 3:00

score 99 · Answer 6 · 2026-03-23 03:24:49

99

Views

When is $A^TR + RA = -2RA$

Published on 23 Mar 2026 - 3:24

score 2.4k · Answer 7 · 2018-02-19 18:07:03

2.4k

Views

Understanding why linear independent columns relate to positive definite matrix and invertibility

Published on 19 Feb 2018 - 18:07

score 207 · Answer 8 · 2018-02-19 20:31:16

207

Views

Can diagonally dominant matrix be written as the sum of diagonally dominant matrices?

Published on 19 Feb 2018 - 20:31

score 154 · Answer 9 · 2026-03-17 20:55:12

154

Views

Is a matrix $M$ PD iff its symmetric part is PD?

Published on 17 Mar 2026 - 20:55

score 757 · Answer 10 · 2026-03-17 05:11:37

757

Views

Inverse of matrix after updating diagonal?

Published on 17 Mar 2026 - 5:11

score 36 · Answer 11 · 2026-03-17 12:53:43

36

Views

Question on why this operator is positive definite

Published on 17 Mar 2026 - 12:53

score 64 · Answer 12 · 2026-03-22 20:00:59

64

Views

if $||AB||_\infty<1$ is I-AB is positive definite ? provided A,B are symmetric and A+B is positive definite

Published on 22 Mar 2026 - 20:00

score 83 · Answer 13 · 2026-03-24 22:01:57

83

Views

How many families of positive definite matrices (not necessarily symmetric) of dimension 2 (up to similarity)?

Published on 24 Mar 2026 - 22:01

score 55 · Answer 14 · 2026-03-17 20:28:00

55

Views

How to prove the following interesting fact about positive definite matrix?

Published on 17 Mar 2026 - 20:28

score 301 · Answer 15 · 2026-03-22 06:45:38

301

Views

Comparing positive definite matrices and their inverses

Published on 22 Mar 2026 - 6:45

List Question

How to prove that $\exists u_1\in P_n$ s.t $y[u_1]$ is minimal and there are finitely many $u_1=(g_1,...,g_n) \in \Bbb Z^n$ s.t $\gcd(g_1,...,g_n)=1$

Find k for Positive Definite Quadratic Form

If I add a positive definite matrix, do I increase the norm?

Product of 2 positive definite matrix

Optimization of the sum of a convex and a non-convex function?

When is $A^TR + RA = -2RA$

Understanding why linear independent columns relate to positive definite matrix and invertibility

Can diagonally dominant matrix be written as the sum of diagonally dominant matrices?

Is a matrix $M$ PD iff its symmetric part is PD?

Inverse of matrix after updating diagonal?

Question on why this operator is positive definite

if $||AB||_\infty<1$ is I-AB is positive definite ? provided A,B are symmetric and A+B is positive definite

How many families of positive definite matrices (not necessarily symmetric) of dimension 2 (up to similarity)?

How to prove the following interesting fact about positive definite matrix?

Comparing positive definite matrices and their inverses

Trending Questions

Popular # Hahtags

Popular Questions