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Question: define general function f(x) without specific form?.

Question:define general function f(x) without specific form?.

looooool 5 Maple 17
December 26 2013
1

Hi all, 

I am quite new to maple. Thanks for your help in advance. 

Could I define a general function f of a single variable x, f(x), without specifying its explicit form? I know it is simple to define functions of specific forms, e.g., f(x)=2*x (In maple: f:=x->2*x). I try to define a function without knowing its form, e.g., f:=x->f(x), expecting maple return f(y) if I type >>f(y). But this does not work (Maple says:

Error, (in temp) too many levels of recursion). 

 

Is it possible to define a general function f(x) without specific form in maple? Thank you again. 
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