Update examples

This updates the examples to showcase the scope of anthem’s feature set.
New examples are added concerning placeholders, hiding predicates, and
simplifications related to integer variables.
This commit is contained in:
Patrick Lühne 2018-04-22 22:26:17 +02:00
parent 6015b225a2
commit 20112317fd
Signed by: patrick
GPG Key ID: 05F3611E97A70ABF
7 changed files with 45 additions and 10 deletions

2
examples/choice-rules.lp Normal file
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p(a).
{q(a)}.

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#external color(1). % assign a set of colors to each vertex
#external edge(2).
#external vertex(1).
#show color/2.
{color(V, C)} :- vertex(V), color(C). {color(V, C)} :- vertex(V), color(C).
% at most one color per vertex
:- color(V, C1), color(V, C2), C1 != C2.
% at least one color per vertex
covered(V) :- color(V, _). covered(V) :- color(V, _).
:- vertex(V), not covered(V). :- vertex(V), not covered(V).
% adjacent vertices dont share the same color
:- color(V1, C), color(V2, C), edge(V1, V2). :- color(V1, C), color(V2, C), edge(V1, V2).
:- color(V, C1), color(V, C2), C1 != C2.
#show color/2.
#external vertex(1).
#external edge(2).
#external color(1).

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examples/letters.lp Normal file
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letter(a).
letter(b).
letter(c).
{p(1..3, Y)} :- letter(Y).
:- p(X1, Y), p(X2, Y), X1 != X2.
q(X) :- p(X, _).
:- X = 1..3, not q(X).
#show p/2.

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#show prime/1.
composite(I * J) :- I = 2..n, J = 2..n. composite(I * J) :- I = 2..n, J = 2..n.
prime(N) :- N = 2..n, not composite(N). prime(N) :- N = 2..n, not composite(N).
#show prime/1.

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#show in/2.
{in(1..n, 1..r)}. {in(1..n, 1..r)}.
covered(I) :- in(I, S). covered(I) :- in(I, S).
:- I = 1..n, not covered(I). :- I = 1..n, not covered(I).
:- in(I, S), in(J, S), in(I + J, S). :- in(I, S), in(J, S), in(I + J, S).
#show in/2.

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s(X) :- p(X).
s(X) :- q(X).
u(X) :- r(X), not s(X).
#show u/1.
#external p(1).
#external q(1).
#external r(1).

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s(X) :- p(X).
s(X) :- q(X).
#external p(1).
#external q(1).