# Butson-type Hadamard matrix

> complex square matrix whose all columns (rows) are mutually orthogonal and which has q-roots of unity as entries

**Wikidata**: [Q5002751](https://www.wikidata.org/wiki/Q5002751)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Butson-type_Hadamard_matrix)  
**Source**: https://4ort.xyz/entity/butson-type-hadamard-matrix