Normal matrix
Set
context
$n\in\mathbb N$
definiendum
$ A \in \mathrm{NormalMatrix}(n) $
postulate
$ A \in \mathrm{SquareMatrix}(n,\mathbb C) $
postulate
$ A^*\ A = A\ A^* $
Discussion
Reference
Wikipedia:
Normal matrix
Parents
Subset of
Square matrix
Context
Matrix conjugate transpose