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add options to substitute vars in Horner and Grobner

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-01-02 15:53:56 -08:00
parent 8596fb2ae6
commit 20af3dd675
7 changed files with 27 additions and 40 deletions
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4
src/math/lp/nla_core.cpp
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@ -1545,7 +1545,7 @@ const rational& core::val_of_fixed_var_with_deps(lpvar j, u_dependency*& dep) {
}
dd::pdd core::pdd_expr(const rational& c, lpvar j, u_dependency*& dep) {
if (var_is_fixed(j)) {
if (m_nla_settings.grobner_subs_fixed() && var_is_fixed(j)) {
return m_pdd_manager.mk_val(c * val_of_fixed_var_with_deps(j, dep));
}
@ -1556,7 +1556,7 @@ dd::pdd core::pdd_expr(const rational& c, lpvar j, u_dependency*& dep) {
dd::pdd r = m_pdd_manager.mk_val(c);
const monic& m = emons()[j];
for (lpvar k : m.vars()) {
if (var_is_fixed(k)) {
if (m_nla_settings.grobner_subs_fixed() && var_is_fixed(k)) {
r *= m_pdd_manager.mk_val(val_of_fixed_var_with_deps(k, dep));
} else {
r *= m_pdd_manager.mk_var(k);