function h = biochemical_linear_conserved ( y )

%*****************************************************************************80
%
%% biochemical_linear_conserved(): conservation for biochemical_linear_ode().
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    22 January 2021
%
%  Author:
%
%    John Burkardt
%
%  Reference:
%
%    Angela Martiradonna, Gianpiero Colonna, Fasma Diele,
%    GeCo: Geometric conservative nonstandard schemesfor biochemical systems,
%    Applied Numerical Mathematics,
%    2019.
%
%  Input:
%
%    real Y(2): the current solution.
%
%  Output:
%
%    real H: the conserved quantity.
%
  h = y(1) + y(2);

  return
end
