On Tuesday 25 May 2010 23:47:30, Mujtaba Boori wrote:
> Hello
> I am try to solve this equation
>
> Define a higher order function  that tests whether two functions , both
> defined on integers , coincide for all integers between 1 and 100
>
>  how can I solve this ?
> is there any thing in Haskell library to solve this kind ?

Sure. Lots of things to do it in different ways. All boil down to
- for each integer from 1 to 100
- check whether f i == g i

Look at
http://www.haskell.org/ghc/docs/6.12.2/html/libraries/base-4.2.0.1/Prelude.html
, there are  useful functions for this. You will probably want to use 'and'
or 'all'.