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function L = resymbol (L, A) %#ok
%RESYMBOL recomputes the symbolic Cholesky factorization of the matrix A.
%
% Example:
% L = resymbol (L, A)
%
% Recompute the symbolic Cholesky factorization of the matrix A. A must be
% symmetric. Only tril(A) is used. Entries in L that are not in the Cholesky
% factorization of A are removed from L. L can be from an LL' or LDL'
% factorization (lchol or ldlchol). resymbol is useful after a series of
% downdates via ldlupdate or ldlrowmod, since downdates do not remove any
% entries in L. The numerical values of A are ignored; only its nonzero
% pattern is used.
%
% See also LCHOL, LDLUPDATE, LDLROWMOD
% Copyright 2006-2015, Timothy A. Davis, http://www.suitesparse.com
error ('resymbol not found') ;
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