# What is the complexity of finding e^(A) for a Hermitian matrix A?

If A is a hermitian matrix of size NxN .What is the order of no. of steps required to compute e^(A).How to prove it?

• (I don't quite see the link between no. of steps required and space-complexity.) – greybeard Nov 16 '19 at 9:19
• What is your computation model? – Yuval Filmus Nov 16 '19 at 17:39
• Action of Hamiltonian – user112077 Nov 17 '19 at 0:39