Hi,
On Tue, Jun 23, 2009 at 6:45 PM, Maurizio<maurizio.gran...@gmail.com> wrote:
> Honestly, I don't actually know whether it means that much, but at
> this point I think that it could be useful for us to follow
> Mathematica in defining two different functions: Heaviside which is
> undefined in 0 and that is defined as the function whose derivative is
> the Dirac Delta ( see
> http://functions.wolfram.com/GeneralizedFunctions/HeavisideTheta/02/
> ) and UnitStep, which is the piecewise version of this function, so
> it's numerically defined everywhere. It would be great if one could
> possibly change the desired value in 0.
>
> I think it doesn't hurt now to carry on both, because it shouldn't be
> that difficult to merge them in future if we don't see any usefulness
> in having them separated.
If I gather properly, we are having two different step functions
(at least for now) as
(2) Heaviside:
(a) represented as: "heaviside"
(b) latex name : "H"
(c) heaviside(0): "heaviside(0)"
(3) Unit Step:
(a) represented as: "unit_step"
(b) latex name : "\mathrm{u}"
(c) unit_step(0) = 1
If there are no more suggestions for change, then I will
post a patch adding support for these functions. I have split
up the integration code involving these functions in a
separate file and will post it later.
Cheers,
Golam
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