Also found in: Dictionary, Wikipedia.
unitary matrix[′yü·nə‚ter·ē ′mā·triks]
A unitary matrix of order n is an n × n matrix [uik] with complex entries such that the product of [uik] and its conjugate transpose [ūki] is the identity matrix E. The elements of a unitary matrix satisfy the relations
The unitary matrices of order n form a group under multiplication. A unitary matrix with real entries is an orthogonal matrix.