+ex power::conjugate() const
+{
+ // conjugate(pow(x,y))==pow(conjugate(x),conjugate(y)) unless on the
+ // branch cut which runs along the negative real axis.
+ if (basis.info(info_flags::positive)) {
+ ex newexponent = exponent.conjugate();
+ if (are_ex_trivially_equal(exponent, newexponent)) {
+ return *this;
+ }
+ return (new power(basis, newexponent))->setflag(status_flags::dynallocated);
+ }
+ if (exponent.info(info_flags::integer)) {
+ ex newbasis = basis.conjugate();
+ if (are_ex_trivially_equal(basis, newbasis)) {
+ return *this;
+ }
+ return (new power(newbasis, exponent))->setflag(status_flags::dynallocated);
+ }
+ return conjugate_function(*this).hold();
+}
+
+ex power::real_part() const
+{
+ if (exponent.info(info_flags::integer)) {
+ ex basis_real = basis.real_part();
+ if (basis_real == basis)
+ return *this;
+ realsymbol a("a"),b("b");
+ ex result;
+ if (exponent.info(info_flags::posint))
+ result = power(a+I*b,exponent);
+ else
+ result = power(a/(a*a+b*b)-I*b/(a*a+b*b),-exponent);
+ result = result.expand();
+ result = result.real_part();
+ result = result.subs(lst( a==basis_real, b==basis.imag_part() ));
+ return result;
+ }
+
+ ex a = basis.real_part();
+ ex b = basis.imag_part();
+ ex c = exponent.real_part();
+ ex d = exponent.imag_part();
+ return power(abs(basis),c)*exp(-d*atan2(b,a))*cos(c*atan2(b,a)+d*log(abs(basis)));
+}
+
+ex power::imag_part() const
+{
+ if (exponent.info(info_flags::integer)) {
+ ex basis_real = basis.real_part();
+ if (basis_real == basis)
+ return 0;
+ realsymbol a("a"),b("b");
+ ex result;
+ if (exponent.info(info_flags::posint))
+ result = power(a+I*b,exponent);
+ else
+ result = power(a/(a*a+b*b)-I*b/(a*a+b*b),-exponent);
+ result = result.expand();
+ result = result.imag_part();
+ result = result.subs(lst( a==basis_real, b==basis.imag_part() ));
+ return result;
+ }
+
+ ex a=basis.real_part();
+ ex b=basis.imag_part();
+ ex c=exponent.real_part();
+ ex d=exponent.imag_part();
+ return power(abs(basis),c)*exp(-d*atan2(b,a))*sin(c*atan2(b,a)+d*log(abs(basis)));
+}
+
+// protected
+