Nov 10, 2009 · What does \+ mean in Prolog? Asked 16 years, 3 months ago Modified 7 years, 10 months ago Viewed 62k times

Jan 25, 2021 · There are some special operators in Prolog, one of them is is, however, recently I came across the =:= operator and have no idea how it works. Can someone explain what this operator …

May 25, 2015 · The = "operator" in Prolog is actually a predicate (with infix notation) =/2 that succeeds when the two terms are unified. Thus X = 2 or 2 = X amount to the same thing, a goal to unify X with …

Nov 22, 2012 · Prolog "or" operator, query Asked 13 years, 2 months ago Modified 12 years, 9 months ago Viewed 157k times

In Prolog, the "not" is an example of "negation as failure", but it is felt that \+ will make it clearer to the programmer just what precisely is being asserted in any given rule. So you CAN use "not" (most PL …

Jan 11, 2014 · 8 The arrow in Prolog does not correspond to material implication in first-order logic. It's a ternary "if-then-else" operator with an optional alternative. Because of the way it's implemented in …

Specifically, Prolog will never consider the third clause of your nrSubliste/2 rule, i.e. the one ignoring list head with _, if H in the second clause is such that munteMain(H) succeeds. Note that using ! makes …

Dec 3, 2017 · Prolog is a bit unique as a programming language: it is declarative, has builtin backtracking, predicates work multidirectional, and the mix of all these features tends to be hard to …

Feb 28, 2011 · 28 Try adding a space between the encoding="UTF-8" string in the prolog and the terminating ?>. In XML the prolog designates this bracket-question mark delimited element at the …

The SWI-Prolog build process put bin and lib under ~/bin and ~/lib Note: the -f flag disables loading the initialization ~/.plrc, and this could be necessary to get more 'strict control' over execution... I'm …