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fix #2613 fix #2612

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-10-05 16:57:51 -07:00
parent 016732aa59
commit 39edf73e78
16 changed files with 222 additions and 162 deletions
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11
src/math/polynomial/polynomial.h
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@ -44,6 +44,11 @@ namespace polynomial {
typedef svector<var> var_vector;
class monomial;
typedef enum { sign_neg = -1, sign_zero = 0, sign_pos = 1} sign;
inline sign operator-(sign s) { switch (s) { case sign_neg: return sign_pos; case sign_pos: return sign_neg; default: return sign_zero; } };
inline sign to_sign(int s) { return s == 0 ? sign_zero : (s > 0 ? sign_pos : sign_neg); }
inline sign operator*(sign a, sign b) { return to_sign((int)a * (int)b); }
int lex_compare(monomial const * m1, monomial const * m2);
int lex_compare2(monomial const * m1, monomial const * m2, var min_var);
int graded_lex_compare(monomial const * m1, monomial const * m2);
@ -278,6 +283,12 @@ namespace polynomial {
*/
static unsigned id(polynomial const * p);
/**
\brief Normalize coefficients by dividing by their gcd
*/
void gcd_simplify(polynomial* p);
/**
\brief Return true if \c m is the unit monomial.
*/