function u_inf = u_m_inf_call(x,tau,k)
% U_M_INF_CALL - the transformed boundary condition at x=-\infty for a call 
% 
% Written by:
% -- 
% John L. Weatherwax                2008-06-11
% 
% email: wax@alum.mit.edu
% 
% Please send comments and especially bug reports to the
% above email address.
% 
%-----

u_inf = 0.0;