function [yl, yu] = invrelerr_snn(y_av, e_max)%INVRELERR_SNN the inverse of the relative error.%% Syntax%%  [yl, yu] = invrelerr_snn(y_av, err)%% Description%%  INVRELERR_SNN takes%   y_av     - error is around y_av%   err      - relative error%  and returns%   yl       - lowest y for which relerr_snn(y, y_av) = err%   yu       - highest y for which relerr_snn(y, y_av) = err%  % See also%%   RELERR_SNN%tmp = sqrt(2*e_max);yu = y_av .* (1 + tmp);yl = y_av .* (1 - tmp);