# Automorphism Group

## `HadamardAutomorphismGroup(H : parameters): AlgMatElt -> AlgMatElt`

```magma
Al: MonStgElt                    Default: "Traces"
```

Given a Hadamard matrix $H$ of degree $n$, returns the automorphism group of $H$ as a permutation group of degree $4n$. The parameter `Al` may be set to one of `"Leon"`, `"nauty"`, or `"Traces"` (the default).