Re: Function definition

*To*: mathgroup at smc.vnet.net*Subject*: [mg18215] Re: Function definition*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Tue, 22 Jun 1999 20:41:11 -0400*Organization*: Mathematics & Statistics, Univ. of Mass./Amherst*References*: <7kmtmi$230@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

In Mathematica 4, for example: f[x_ /; x \[Element] Reals] := x^2 f[1.2] 1.44 f[2] 4 f[2 + 3 I] f[2 + 3 I] Of course, one would probably enter the condition on x in the form Esc elem Esc to produce an actual epsilon-like "element-of" symbol in StandardInput form. Jesus Perez Ortega wrote: > > Hi All, > How can I restrict a variable to be Real in the function definition? > Regards > -- > Jesus Perez Ortega > jesper at bqto.unexpo.edu.ve -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. phone 413 549-1020 (H) Univ. of Massachusetts 413 545-2859 (W) Amherst, MA 01003-4515

**Follow-Ups**:**Re: Re: Function definition***From:*"Kevin J. McCann" <kevinmccann@Home.com>