function ab=sr_erfc(dig,nofdig,N)
%SR_ERFC Recurrence coefficients for the coerror function.
%   AB=SR_ERFC(DIG,NOFDIG,N) generates in DIG-digit arithmetic
%   the first N  recurrence coefficients for the weight  
%   function W(X)=ERFC(X) on [0,Inf] and places them to NOFDIG
%   digits into the Nx2 array AB.

digits(dig);
mom=smom_erfc(dig,N);
ab=schebyshev(dig,N,mom');
ab=vpa(ab,nofdig);
