This paper has popularized the concept of unitary matrix, introduced the column (row) unitary matrix and discussed their properties.
Further popularization of unitary matrix and their properties;
In this paper, backward errors for seven kinds of structured unitary matrix eigenvalue problems are discussed.
The key of this method is to spread a perfect sequence by correlation product of the shift sequences set of the perfect sequence and corresponding unitary matrix.
A lossless polarization transfer matrix is a unitary matrix, and reciprocal forward and backward polarization transfer matrices are transposed each other.