#import std
#import nat

band = pad0+ ~&rSS+ zipt^*D(~&r,^lrrSPT/~&ltK33tx zipt^/~&r ~&lSNyCK33+ zipp0)^/~&rx ~&B->NlNSPC ~&bt

deconv = lapack..dgelsd^\~&l ~&||0.!**+ band