Synopsis
		sfdivn < fnum.rsf den=fden.rsf > frat.rsf niter=100 verb=y rect#=(1,1,...)

Parameters
		file den= auxiliary input file name   int niter=100 number of iterations   int rect#=(1,1,...) smoothing radius on #-th axis   bool verb=y [y/n] verbosity

Used In
		GEO384W          hw4/synth   JSG          diffr/fault shape/beivc timefreq/lowf timefreq/syn   MILANO          taupvel/cmp   SEP          vc2/beivc vc2/sigvc