Quadrant Interlocking Factorization of Hourglass Matrix.

This paper presents hourglass matrix, a dense square matrix which is obtained from Quadrant Interlocking Factorization (QIF) of nonsingular matrix. We discuss the condition to generate its nonzero entries and formulate its total number of zero and nonzero entries. Furthermore, the determinant of even and odd order of the matrix as well as the eigenvalue of the odd order of the matrix are examined. In all, we give some deductions to differentiate between hourglass matrix and classical Z-matrix. [ABSTRACT FROM AUTHOR]