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work on Grobner

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2019-10-08 17:36:27 -07:00
parent 70b57fbd02
commit 7d13bcb18e
4 changed files with 135 additions and 40 deletions
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13
src/math/lp/nex.h
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@ -55,6 +55,8 @@ class nex_scalar;
// This is the class of non-linear expressions
class nex {
public:
// the scalar and the variable have size 1
virtual unsigned size() const { return 1; }
virtual expr_type type() const = 0;
virtual std::ostream& print(std::ostream&) const = 0;
nex() {}
@ -160,9 +162,6 @@ public:
friend std::ostream& operator<<(std::ostream& out, const nex_pow & p) { out << p.to_string(); return out; }
};
bool less_than_nex(const nex* a, const nex* b, const lt_on_vars& lt);
class nex_mul : public nex {
vector<nex_pow> m_children;
@ -395,10 +394,10 @@ inline std::ostream& operator<<(std::ostream& out, const nex& e ) {
return e.print(out);
}
inline bool less_than_nex_standard(const nex* a, const nex* b) {
lt_on_vars lt = [](lpvar j, lpvar k) { return j < k; };
return less_than_nex(a, b, lt);
}
// inline bool less_than_nex_standard(const nex* a, const nex* b) {
// lt_on_vars lt = [](lpvar j, lpvar k) { return j < k; };
// return less_than_nex(a, b, lt);
// }
inline std::unordered_set<lpvar> get_vars_of_expr(const nex *e ) {
std::unordered_set<lpvar> r;