# matrices related issues & queries in MathXchanger

## ODE system with 3x3 matrix.

Updated February 23, 2018 11:20 AM

## rank of $PQ$, rank of $QP$

Updated February 23, 2018 07:20 AM

## Matrix derivative of transpose

Updated February 22, 2018 19:20 PM

## Find the kernel of a 4x4 matrix

Updated February 22, 2018 11:20 AM

## Linear algebra: $Ax=b$, proof

Updated February 21, 2018 07:20 AM

## Basis for Matrix A

Updated February 20, 2018 23:20 PM

## 2-norm of a residual

Updated February 20, 2018 18:20 PM

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