Prolog, find minimum in a list

Question

in short: How to find min value in a list? (thanks for the advise kaarel)

long story:

I have created a weighted graph in amzi prolog and given 2 nodes, I am

Answer 1

Solution without "is".

min([],X,X).
min([H|T],M,X) :- H =< M, min(T,H,X).
min([H|T],M,X) :- M < H, min(T,M,X).
min([H|T],X) :- min(T,H,X).