[GiNaC-devel] Even powers of modulus are rationalized

[Vladimir V. Kisil]

	Dear All,

	I believe that |z|^2= z*conjugate(z) is valid for any z. Also,
  the automatic substitution 

  abs(z)^(2n) -> z^n * conjugate(z)^n 

  shall make an expression more rational and, thus, more accessible to
  GiNaC. Therefore, I propose the attached alteration of abs_power().

  Best wishes,
  Vladimir
-- 
Vladimir V. Kisil     email: kisilv at maths.leeds.ac.uk
                        www: http://www.maths.leeds.ac.uk/~kisilv/
Book: Geometry of Mobius Transformations
http://www.worldscientific.com/worldscibooks/10.1142/p835
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