public:
unsigned precedence() const {return 30;}
bool info(unsigned inf) const;
+ bool is_polynomial(const ex & var) const;
int degree(const ex & s) const;
int ldegree(const ex & s) const;
ex coeff(const ex & s, int n = 1) const;
ex smod(const numeric &xi) const;
numeric max_coefficient() const;
ex conjugate() const;
+ ex real_part() const;
+ ex imag_part() const;
protected:
/** Implementation of ex::diff for a numeric always returns 0.
* @see ex::diff */
const numeric & operator=(double d);
const numeric & operator=(const char *s);
const numeric inverse() const;
+ numeric step() const;
int csgn() const;
int compare(const numeric &other) const;
bool is_equal(const numeric &other) const;
inline const numeric inverse(const numeric &x)
{ return x.inverse(); }
+inline numeric step(const numeric &x)
+{ return x.step(); }
+
inline int csgn(const numeric &x)
{ return x.csgn(); }