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port grobner basis functionality, prepare create nex objects to the grobner basis calculation

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2019-09-19 15:51:01 -07:00
parent e8b6b870ac
commit a085edceff
12 changed files with 424 additions and 274 deletions
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49
src/math/lp/nla_grobner.h
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@ -21,6 +21,7 @@
#include "math/lp/nla_common.h"
#include "math/lp/nex.h"
#include "math/lp/nex_creator.h"
#include "util/dependency.h"
namespace nla {
@ -35,21 +36,6 @@ struct grobner_stats {
grobner_stats() { reset(); }
};
struct monomial {
rational m_coeff;
svector<lpvar> m_vars; //!< sorted variables
friend class grobner;
friend struct monomial_lt;
monomial() {}
public:
rational const & get_coeff() const { return m_coeff; }
unsigned get_degree() const { return m_vars.size(); }
unsigned get_size() const { return get_degree(); }
lpvar get_var(unsigned idx) const { return m_vars[idx]; }
};
enum class var_weight {
FIXED = 0,
QUOTED_FIXED = 1,
@ -64,6 +50,21 @@ enum class var_weight {
class nla_grobner : common {
struct monomial {
rational m_coeff;
svector<lpvar> m_vars; //!< sorted variables
friend class grobner;
friend struct monomial_lt;
monomial() {}
public:
rational const & get_coeff() const { return m_coeff; }
unsigned get_degree() const { return m_vars.size(); }
unsigned get_size() const { return get_degree(); }
lpvar get_var(unsigned idx) const { return m_vars[idx]; }
};
class equation {
unsigned m_scope_lvl; //!< scope level when this equation was created.
unsigned m_bidx:31; //!< position at m_equations_to_delete
@ -95,6 +96,12 @@ class nla_grobner : common {
equation_set m_processed;
equation_set m_to_process;
bool m_nl_gb_exhausted;
ptr_vector<nex> m_allocated;
lp::int_set m_tmp_var_set;
region m_alloc;
ci_value_manager m_val_manager;
ci_dependency_manager m_dep_manager;
nex_creator m_nex_creator;
public:
nla_grobner(core *core);
void grobner_lemmas();
@ -137,7 +144,17 @@ private:
void get_equations(ptr_vector<equation>& eqs);
bool try_to_modify_eqs(ptr_vector<equation>& eqs, unsigned& next_weight);
bool internalize_gb_eq(equation*);
void add_row_to_gb(unsigned);
void add_row(unsigned);
void add_monomial_def(lpvar);
void assert_eq_0(ptr_buffer<monomial> &, v_dependency * dep);
void process_var(nex_mul*, lpvar j, ci_dependency *& dep, rational&);
nex* mk_monomial_in_row(rational, lpvar, ci_dependency*&);
rational get_monomial_coeff(const nex_mul* m) {
const nex* a = m->children()[0];
if (a->is_scalar())
return static_cast<const nex_scalar*>(a)->value();
return rational(1);
}
}; // end of grobner
}