21. If X is a positive semi-definite square matrix , commonly referred to as the variance-covariance matrix. 22. For example, a projection is a square matrix satisfying. 23. P would then be a nxn square matrix . 24. If =, then is a function from to itself and the Jacobian matrix is a square matrix . 25. "' Square Matrix 004 "'is a compilation album put out by Alfa Matrix on June 1, 2004. 26. The elementary divisors of a square matrix " A " are the characteristic polynomials of its Jordan blocks. 27. Conversely, any square matrix with zero trace is a linear combinations of the commutators of pairs of matrices. 28. Any complex square matrix is triangularizable. 29. A matrix which has the same number of rows and columns is called a " square matrix ". 30. In the context of Hilbert spaces, a square matrix is unitarily diagonalizable if and only if it is normal.
