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15
Math.TechQA.Club
2026-04-24 17:39:20
190
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Inequality regarding diagonal entries and eigenvalues of a PSD matrix
Published on
24 Apr 2026 - 17:39
#linear-algebra
#inequality
#eigenvalues-eigenvectors
#positive-semidefinite
#matrix-analysis
391
Views
"Almost Normal" Matrix and Gap between Spectral Radius/Norm
Published on
10 May 2026 - 19:23
#matrices
#matrix-norms
#spectral-radius
#matrix-analysis
#spectral-norm
111
Views
Which of the statements is/are TRUE?
Published on
28 Apr 2026 - 6:35
#matrices
#functional-analysis
#normed-spaces
#matrix-analysis
#infinite-matrices
56
Views
Trace of a Summation of Positive Definite Matrices with a Real Coefficient
Published on
25 Mar 2026 - 14:26
#linear-algebra
#matrices
#trace
#positive-definite
#matrix-analysis
3.1k
Views
Index of a Nilpotent matrix
Published on
25 Apr 2026 - 18:02
#linear-algebra
#matrices
#ring-theory
#nilpotence
#matrix-analysis
185
Views
Trace of a Summation of Positive Definite Matrices
Published on
25 Mar 2026 - 14:26
#linear-algebra
#matrices
#positive-definite
#matrix-analysis
1.2k
Views
Do eigenvalues depend smoothly on the matrix elements of a diagonalizable matrix?
Published on
25 Mar 2026 - 16:06
#real-analysis
#linear-algebra
#matrices
#eigenvalues-eigenvectors
#matrix-analysis
223
Views
Numerical radius of $2 \times 2$ complex matrix
Published on
25 Mar 2026 - 14:20
#matrices
#functional-analysis
#operator-theory
#operator-algebras
#matrix-analysis
1k
Views
Matrix exponential is continuous
Published on
25 Mar 2026 - 14:19
#matrices
#continuity
#matrix-calculus
#matrix-exponential
#matrix-analysis
52
Views
Sufficient condition for total nonnegativity
Published on
25 Mar 2026 - 14:21
#matrices
#matrix-analysis
43
Views
Invariance of numerical radius
Published on
25 Mar 2026 - 17:37
#functional-analysis
#operator-theory
#operator-algebras
#matrix-analysis
83
Views
About trace duality and other two bounds...
Published on
25 Mar 2026 - 16:06
#linear-algebra
#matrices
#convex-analysis
#matrix-decomposition
#matrix-analysis
282
Views
Equality in trace duality
Published on
25 Mar 2026 - 14:19
#real-analysis
#linear-algebra
#matrices
#duality-theorems
#matrix-analysis
70
Views
$A$ is a $12\times12$ matrix such that $A^{10 }=I$, and $\operatorname{rank}(A-I)=5$. How can we show $\operatorname{rank}(A^2 +A+I)\leq 7$?
Published on
25 Mar 2026 - 14:25
#linear-algebra
#matrices
#matrix-analysis
93
Views
Real Hadamard powers of matrices
Published on
10 May 2026 - 21:55
#matrices
#hadamard-product
#matrix-analysis
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