On the banded Toeplitz structured distance to symmetric positive semidefiniteness
On the banded Toeplitz structured distance to symmetric positive semidefiniteness
This paper is concerned with the determination of a close real banded positive definite Toeplitz matrix in the Frobenius norm to a given square real banded matrix. While it is straightforward to determine the closest banded Toeplitz matrix to a given square matrix, the additional requirement of positive definiteness makes …