[Date Index] [Thread Index] [Author Index]

Re: Using a logical Or in the function definition

• To: mathgroup at smc.vnet.net
• Subject: [mg86704] Re: Using a logical Or in the function definition
• From: "ahallam at iastate.edu" <ahallam at iastate.edu>
• Date: Wed, 19 Mar 2008 05:22:59 -0500 (EST)
• References: <fro39q$i8a$1@smc.vnet.net>

On Mar 18, 4:50 am, "ahal... at iastate.edu" <ahal... at iastate.edu> wrote:
> I would like to use Or in the function definition as in
>
> ab[ Or[r_Integer,r_Rational], Or[s_Integer,s_Rational] ]:=r/s;
>
> In other words, I want the function to take integers or ratios of
> integers as arguments, but not real numbers which are not rational.
>
>  But if I give the function integer arguments, it does not evaluate.
>
> If I try
>
> ar[ r_Integer , Or[s_Integer , s_Rational]] := r/s;
>
> and give an integer first argument it works and so on.

Thanks to everyone who replied.

These are all great ``alternatives'' as opposed to logical solutions.

Using alternative instead of logical was what I needed.