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propagate lineal monomial

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This commit is contained in:
Lev Nachmanson 2023-09-01 11:18:03 -07:00
parent 5509b468e9
commit d3258e7084
3 changed files with 15 additions and 3 deletions
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6
src/math/lp/monomial_bounds.cpp
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@ -283,7 +283,7 @@ namespace nla {
break;
}
}
lemma |= ineq(m.var(), lp::lconstraint_kind::NE, 0);
lemma += ineq(m.var(), lp::lconstraint_kind::EQ, 0);
}
else {
for (auto v : m)
@ -295,9 +295,9 @@ namespace nla {
lp::lar_term term;
term.add_var(m.var());
term.add_monomial(-k, w);
lemma |= ineq(term, lp::lconstraint_kind::NE, 0);
lemma += ineq(term, lp::lconstraint_kind::EQ, 0);
} else {
lemma |= ineq(m.var(), lp::lconstraint_kind::NE, k);
lemma += ineq(m.var(), lp::lconstraint_kind::EQ, k);
}
}

11
src/math/lp/nla_core.cpp
View file

@ -1056,6 +1056,17 @@ new_lemma& new_lemma::operator|=(ineq const& ineq) {
}
return *this;
}
// Contrary to new_lemma::operator|=, this method does not assert that the model does not satisfy the ineq.
// If ineq holds then it is a nop.
new_lemma& new_lemma::operator+=(ineq const& ineq) {
if (c.ineq_holds(ineq)) return *this;
if (!c.explain_ineq(*this, ineq.term(), ineq.cmp(), ineq.rs())) {
current().push_back(ineq);
}
return *this;
}
new_lemma::~new_lemma() {

1
src/math/lp/nla_types.h
View file

@ -83,6 +83,7 @@ namespace nla {
new_lemma& operator&=(const factorization& f);
new_lemma& operator&=(lpvar j);
new_lemma& operator|=(ineq const& i);
new_lemma& operator+=(ineq const& i);
new_lemma& explain_fixed(lpvar j);
new_lemma& explain_equiv(lpvar u, lpvar v);
new_lemma& explain_var_separated_from_zero(lpvar j);