Synopsis
		sfdivn < fnum.rsf den=fden.rsf > frat.rsf niter=100 verb=y eps=0.0f rect#=(1,1,...)

December 2015 program of the month:
http://ahay.org/blog/2015/12/22/program-of-the-month-sfdivn/

Parameters
		file den= auxiliary input file name   float eps=0.0f regularization   int niter=100 number of iterations   int rect#=(1,1,...) smoothing radius on #-th axis   bool verb=y [y/n] verbosity

Used In
		DATA          cant12/stk   GEO384W          hw4/synth   JLU          riesz/fieldata riesz/sigmdenoi riesz/sigmoid vdseislet/nmo   MILANO          taupvel/cmp   RSF          tutorials/wavelet   SEP          vc2/beivc vc2/sigvc   SWAG          itime/oz2 itime/oz6 itime/syn   TCCS          apwd/crnfld apwd/trace dealiase2/hyper dealiase2/hypern diffr/fault diffr/gom dtwaniso/synthetic-gather ortho/orthocsimul ovc/nankai ovc/psovc pi/barrolka pi/bei probdif/nankai probdif/noisy-synthetic probdif/synthetic probdif/toy scan3/fourevents scan3/noncwavg-1 scan3/realdata shape/beivc sswtapp/boonsville synwav/lowf t2dweak/field time2depth2/beinew timefreq/lowf timefreq/syn uncert/beivc wetm/beivel   ZJU          diffrlrra/fault optnoise/slope q/field q/simple q/var