% -*- texinfo -*-
% @deftypefn {Function File} {} isdefinite (@var{x}, @var{tol})
% Return 1 if @var{x} is symmetric positive definite within the
% tolerance specified by @var{tol} or 0 if @var{x} is symmetric
% positive semidefinite. Otherwise, return -1. If @var{tol}
% is omitted, use a tolerance equal to 100 times the machine precision.
% @seealso{issymmetric}
% @end deftypefn