is_stable

% -*- texinfo -*-
% @deftypefn {Function File} {} is_stable (@var{a}, @var{tol}, @var{dflg})
% @deftypefnx {Function File} {} is_stable (@var{sys}, @var{tol})
% Returns 1 if the matrix @var{a} or the system @var{sys}
% is stable, or 0 if not.
%
% @strong{Inputs}
% @table @var
% @item  tol
% is a roundoff parameter, set to 200*@code{eps} if omitted.
% @item dflg
% Digital system flag (not required for system data structure):
% @table @code
% @item @var{dflg} ~= 0
% stable if eig(a) is in the unit circle
%
% @item @var{dflg} == 0
% stable if eig(a) is in the open LHP (default)
% @end table
% @end table
% @seealso{size, rows, columns, length, ismatrix, isscalar, isvector, is_observable, is_stabilizable, is_detectable, krylov, krylovb}
% @end deftypefn