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MSC2020 · 15Bxx

Special matrices

Special matrices

2 mapped entries · Browse and filter all →

Counts include all statuses and descendants. Classifications are editorial or inferred from community fields, not an AMS assessment of the problem.

Subcategories

15B05Toeplitz, Cauchy, and related matrices0 15B10Orthogonal matrices0 15B15Fuzzy matrices0 15B30Matrix Lie algebras0 15B33Matrices over special rings (quaternions, finite fields, etc.)0 15B34Boolean and Hadamard matrices2 15B35Sign pattern matrices0 15B36Matrices of integers0 15B48Positive matrices and their generalizations; cones of matrices0 15B51Stochastic matrices0 15B52Random matrices (algebraic aspects)0 15B57Hermitian, skew-Hermitian, and related matrices0 15B99Special matrices0

Mapped problems

OP-12031CombinatoricsOpen

Asymptotic counting exponent for partial Hadamard matrices ( $C_{23c}$ )

Asymptotic counting exponent for partial Hadamard matrices: determine C 23c or improve its bounds; the repository records 1 (lower) and 3 (upper).

Optimization Constants in Mathematics — Davis, Ivanisvili & Tao· Licensed source statement· 2026

OP-12030CombinatoricsOpen

Minimal condition number decay for sign matrices ( $C_{23b}$ )

Minimal condition number decay for sign matrices: determine C 23b or improve its bounds; the repository records frac 17 92 (lower) and 1 (upper).

Optimization Constants in Mathematics — Davis, Ivanisvili & Tao· Licensed source statement· 2026

Journals & articles in MSC 15

These are selected sources for the parent class. Article coverage is a first reviewed selection, and may not cover this exact subcategory.

Journal of Algebra ↗

Elsevier

Algebraic structures and representations

Acta Numerica ↗

Cambridge University Press

Surveys in numerical analysis

Randomized numerical linear algebra: Foundations and algorithms
2020 · 0 questions extracted

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MSC2020 © Mathematical Reviews (AMS) and zbMATH · CC BY-NC-SA 4.0 · Official PDF, page 41