Added sflistminmax program to construct “incremental” minimum or maximum lists from an RSF file.
sflistminmax constructs the following set of minimum or maximum lists for each x2, x3, … xn in the input RSF file:
out = in
out[i] = min or max of (in[i], out[i-1]) for i = 1, 2, 3, … n1
sflistminmax mode=min can be used to simulate “erosion” for a set of geological surfaces, producing a new set of surfaces that do not cross.