\Pi

[Lacky]

Hi all, is there any \Pi value embedded in AMPL. I need to impose some
(silly) non convex constraints in the form sin(2*Pi*u) = 0

Thanks

Fabrizio

[Robert Fourer]

There's no built-in symbol for pi, but it's easy to define a parameter equal
to the computer representation of the value of pi, by writing, say,

param pi = 4 * atan(1);

(With certain editors, I am told, you can actually use the symbol for the
Greek letter pi as an AMPL parameter name.)

Bob Fourer
4...@ampl.com

[Juan Pablo Fernández G]

Hi, i would like to know if this definition of Pi could be inside the model.

[Juan Pablo Fernández G]

I have already done, this instruction can be in model.

El miércoles, 14 de octubre de 2009 10:05:12 UTC-5, Lacky escribió:

[khan]

Is there any way to define iota as well?

[AMPL Google Group]

AMPL doesn't support the complex number, but you could use param to represent real and imaginary part.

--
Paras Tiwari
am...@googlegroups.com

{#HS:527186929-780#}

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