Re: assume an integer
- To: mathgroup at smc.vnet.net
- Subject: [mg22449] Re: assume an integer
- From: "Allan Hayes" <hay at haystack.demon.co.uk>
- Date: Wed, 8 Mar 2000 02:21:49 -0500 (EST)
- References: <89qgh4$ah5@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Peter,
We can't do this globally, but we do have
Simplify[{Cos[m Pi],
Sin[m Pi] }, {m \[Element] Integers}] // InputForm
{(-1)^m, 0}
Allan
---------------------
Allan Hayes
Mathematica Training and Consulting
Leicester UK
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
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"Peter Jay Salzman" <covenant at dirac.org> wrote in message
news:89qgh4$ah5 at smc.vnet.net...
> hi all
>
> is it possible to have Mathematica assume a variable is an integer? i
can't find an
> example in the Mathematica book (book is for 3.0, but i'm using 4.0).
>
> what i'm getting at is:
> Cos[m Pi] = (-1)^m
> Sin[n Pi] = 0
>
> etc. thanks!
> pete
>
>