[GiNaC-devel] New in GiNaC: step function
kisilv at maths.leeds.ac.uk
Thu Mar 9 17:31:13 CET 2006
>>>>> "CD" == Chris Dams <Chris.Dams at mi.infn.it> writes:
CD> ignored. Furthermore step(0)=1/2. This, however, should not be
CD> taken too seriously as there is also the automatic evaluation
CD> step(x)^2 -> step(x).
For a bigger consistency I would prefer to have either step(0)=0 or
step(0)=1. Such a small features which is easy to overlook sometimes
takes hours to realise.
If three-values are really needed we may have another function
with the property sign(x)^3 -> sign(x). The current step(x) is then
Vladimir V. Kisil email: kisilv at maths.leeds.ac.uk
-- www: http://maths.leeds.ac.uk/~kisilv/
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