Helicon - Helix convolution and deconvolution (N-dimensional!)
Helicon < in.H filt= adj=0 div=0 > out.H
Applies helix convolution (polynomial multiplication) or deconvolution (polynomial division). One is the exact inverse of the other. Watch for helical boundary conditions.
integer adj=0 - apply adjoint (backward) filtering
integer div=0 - apply inverse recursive filtering (polynomial division)
logical regrid=1 - regrid the filter
logical regrid=0 - bound the filter
real a0=1 - zero-lag filter coefficient
gee/hlx/helderiv/, gee/hlx/helicon90/, gee/hlx/helocut90/, gee/mda/morgan/, gee/prc/sep95/
helicon.lop, polydiv.lop, regrid.r90, helix.r90