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function x = cs_lsolve (L,b) %#ok
%CS_LSOLVE solve a sparse lower triangular system L*x=b.
% x = cs_lsolve(L,b) computes x = L\b, L must be lower triangular with a
% zero-free diagonal. b must be a column vector. x is full if b is full.
% If b is sparse, x is sparse but the nonzero pattern of x is NOT sorted (it
% is returned in topological order).
%
% Example:
% Prob = ssget ('HB/bcsstk01') ; L = cs_chol (Prob.A) ; n = size (L,1) ;
% b = rand (n,1) ; x = cs_lsolve (L,b) ; norm (L*x-b)
%
% See also CS_LTSOLVE, CS_USOLVE, CS_UTSOLVE, MLDIVIDE.
% CXSparse, Copyright (c) 2006-2022, Timothy A. Davis. All Rights Reserved.
% SPDX-License-Identifier: LGPL-2.1+
error ('cs_lsolve mexFunction not found') ;
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