expresion with variables from a list

*To*: mathgroup at smc.vnet.net*Subject*: [mg50479] expresion with variables from a list*From*: woutertjuh at hotmail.com (wouter)*Date*: Mon, 6 Sep 2004 03:59:39 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

hello, I have what is probably a very easy question. I want to define an expression which has as as variables the elements of some previously defined list. like for example, if you have lists: list1 = {a, b} and list2 ={a, b, c} then I want to define an expression that can evaluate both the variables in list one and in list two that is: f[list_] := ..., which evaluates f[list1] = f[a_, b_] and f[list2] = f[x_,y_,z_]. this must be pausible in some way, not? thanx