clpfd - Prolog arithmetic -


if had following swi prolog queries , answers

[a,b,c] ins 1..3, a#= b + c.

and needed select below incorrect:

a in 2..3, b in 1..3, c in 1..3.

would correct in thinking in 2..3 not possible in no case can = 3?

actually, constraint does, reduce domains of b , c.

since sum must in range 1..3, , both have range 1..3. must assume values in range 1..2.

then a in 2..3 it's right answer there.


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