%SCHOL  Cholesky factorization for positive semidefinite matrices%% Syntax:%   [L,def] = schol(A)%% In:%   A - Symmetric pos.semi.def matrix to be factorized%% Out:%   L   - Lower triangular matrix such that A=L*L' if def>=0.%   def - Value 1,0,-1 denoting that A was positive definite,%         positive semidefinite or negative definite, respectively.%% Description:%   Compute lower triangular Cholesky factor L of symmetric positive%   semidefinite matrix A such that%%     A = L*L'%% See also%   CHOL% Copyright (C) 2006 Simo S鋜kk