Program sffedchain1 | Fast explicit diffusion using chains - linear operator 
[SYNOPSIS]
sffedchain1 < inp.rsf weight=wht.rsf sig=sig.rsf > out.rsf adj=n
[PARAMETERS]
bool    | adj | =n |  [y/n] | 	adjoint flag 
file    | sig | = |   | 	auxiliary input file name
file    | weight | = |   | 	auxiliary input file name
[DIRECTORY]
user/fomels
