# 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.

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### How can i determine the elements of this matrix?

**0**

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### Vector Inequality Transformation based on Chebyshev ball (centered at the origin) [on hold]

**4**

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### Do we know what the impulse to “introduce” the Jordan canonical form was?

**4**

**1**answer

### Trace of inverse of random positive-definite matrix in high dimension?

**3**

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### How can I find the integral orthogonal group of a given symmetric positive definite form?

**3**

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### Algebra of block matrices with scalar diagonals

**4**

**1**answer

### Lipschitz property of matrix function only depending on singular values

**1**

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### How to obtain mathematical expectation with the vector as random variable?

**2**

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### Generalization of Cauchy's eigenvalue interlacing theorem?

**1**

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### How can one integrate over the unit cube, subject to certain (quantum-information-theoretic) constraints?

**1**

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### Recovering “$n$” from $M_n(\mathbb{C})$

**7**

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### Does a non-singular matrix have a large minor with disjoint rows and columns and full rank?

**3**

**1**answer

### Representation of $4\times4$ matrices in the form of $\sum B_i\otimes C_i$

**2**

**1**answer

### Equalities between transforms of matrices that are extremely different

**3**

**1**answer