GiNaC/ginac numeric.cpp

[Richard Kreckel]

Update of /home/cvs/GiNaC/ginac

Modified Files:
      Tag: ginac_1-2
	numeric.cpp 
Log Message:
* numeric::power(): try harder finding unit exponents.
* numeric::power_dyn(): likewise.
* numeric::sub_dyn(): special treatment of zero lhs.
* numeric::div_dyn(): special treatment of unit numerator.