# Questions tagged [matrices]

Questions where the notion matrix has an important or crucial role (for the latter, note the tag matrix-theory for potential use). Matrices appear in various parts of mathematics, and this tag is typically combined with other tags to make the general subject clear, such as an appropriate top-level tag ra.rings-and-algebras, co.combinatorics, etc. and other tags that might be applicable. There are also several more specialized tags concerning matrices.

**3**

**0**answers

### Sparsest similar matrix

**0**

**1**answer

### Matrix equation of the form $C A C^\intercal = D$

**3**

**1**answer

### Can we classify the general linear maps such that for a fixed matrix $A \in M_n(\mathbb R)$ the conjuagation action fixes the first column?

**4**

**1**answer

### Intuitive proof of Golden-Thompson inequality

**6**

**0**answers

### Tiling with Horn's polytopes

**6**

**0**answers

### another extremal property of regular polygons

**4**

**0**answers

### Is every stable matrix orthogonally similar to a $D$-skew-symmetric matrix?

**5**

**2**answers

### Generalizing Polar Decomposition of Matrices

**0**

**0**answers

### Every singular DNN realization of $G$ is completely positive implies

**2**

**1**answer

### Eigenvalues of A^T D A for positive A and diagonal D

**7**

**1**answer

### The determinant of a $4\times4$ matrix associated to some specific polynomial as follow

**0**

**0**answers

### What can we say about the dominant Generalized eigen vector of two matrices A and B if the dominant eigen vector of A and B are known?

**0**

**0**answers

### Existence of an “almost” skew-symmetric matrix

**3**

**1**answer

### On the existence of integer square root of a $3 \times 3$ positive definite matrix

**2**

**0**answers

### On a matrix inequality based on the Schur-Horn theorem

**7**

**2**answers

### A (linear) optimization problem subject to (linear) matrix inequality constraints

**2**

**0**answers

### Space of change of basis matrices between two similar matrices - how to reduce it with additional tests?

**1**

**2**answers

### A “positive diagonal plus skew-symmetric” matrix decomposition

**5**

**1**answer

### On the linear factors of a polynomial obtained from the determinant of a matrix whose entries are related to Binomial expansion

**2**

**0**answers

### A parametrization of stable matrices

**4**

**1**answer

### Which inner products preserve positive correlation?

**7**

**1**answer

### Block matrices and their determinants

**1**

**0**answers

### Euclidean volumes under the matrix norm of one-parameter subsets of unit balls of $2 \times 2$ matrices

**3**

**2**answers

### Find parameter values for which a 3x3 matrix has a triple eigenvalue

**1**

**0**answers

### Point-wise invertible non-linearity to reduce matrix rank [closed]

**2**

**2**answers

### Cycle index of $(S_n \times S_n) \rtimes C_2$ acting on matrix indices by row/column permutation and transposition

**13**

**7**answers

### Is the linear span of special orthogonal matrices equal to the whole space of $N\times N$ matrices?

**2**

**0**answers

### An inequality concerning the solution of a Lyapunov equation

**1**

**0**answers

### Perturbed identity in bilinear form

**4**

**1**answer

### Efficient Matrix Precomputation

**2**

**1**answer

### The minimum rank of a matrix over GF(2) when part of non-zero off-diagonal elements are set to be zero

**6**

**1**answer

### Which zero-diagonal matrices contain the all-one vector in their columns' conic hull?

**2**

**1**answer

### What can be said about the relationship between the eigenvalues of a negative definite matrix and of its Schur complement?

**3**

**0**answers

### Eigenvectors of sum of SO(3) matrices

**3**

**1**answer

### radical of a certain ideal of sixteen variable polynomial ring, generated by the entries of certain matrices

**9**

**2**answers

### A trace-constrained maximization problem in the cone of positive definite matrices

**5**

**1**answer

### Largest Eigenvalue of a Matrix with Special Form in terms of n

**4**

**3**answers

### Non linear matrix equation

**11**

**0**answers

### Matrices that admit a power that is symmetric

**2**

**0**answers

### Is there a transitive Lie group action on the space of matrices with rank bigger than $k$?

**1**

**0**answers

### Construction of homogeneous space

**13**

**1**answer

### Tuples of 2x2-matrices simultaneously conjugate to matrices with integer entries

**3**

**0**answers

### An eigenvalue of certain family of matrices

**2**

**0**answers

### Generalization of Carleman coefficients to multivariable functions - Carleman tensor?

**3**

**0**answers

### Simultaneous Congruence of Two Matrices

**1**

**0**answers

### Upper bounds on absolute eigenvalue of sum of two matrix

**1**

**0**answers

### Bounds of Procrustes problem

**0**

**0**answers

### Matrices with half columns nonnegative and half columns nonpositive real numbers

**0**

**0**answers

### On the existence condition of a solution to a matrix equation

**1**

**1**answer