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Re: Mathematica and Symbolic Manipulation

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  • Subject: [mg114534] Re: Mathematica and Symbolic Manipulation
  • From: Richard Fateman <fateman at>
  • Date: Tue, 7 Dec 2010 06:44:59 -0500 (EST)
  • References: <ictg1v$mkc$> <id01n6$h89$> <idhivl$923$>

On 12/5/2010 6:49 PM, olfa wrote:
> On 29 nov, 12:10, Andrea<btlgs2... at>  wrote:
>> On Nov 28, 12:56 pm, olfa<olfa.mra... at>  wrote:
>>> Dear All,
>>> I'm facing a big problem with Mathematica because I need to use it
>>> SYMBOLICALLY for many functions like:
>>> 1)Nest[f,x,i] (without knowing the value of i)
>>> 2)Table[exp,{index,i,n}] (without knowing the values of i and n)
>>> 3)Rest[m] such that m is a symbolic list (without knowing its concrete
>>> elements)
>>> How to deal with that?
>>> Thank you for your help.
>> I olfa,
>> what do you mean for simbolically use of these functions?
>> When you write them Mathematica just keep them unevaluated, just
>> writing some message that you can suppress ( look at tutorial/Messages
>> section of reference for info).
>> This is not the result you want?
>> Andrea
> Hi andrea
> Here is an example of what I need to do:
> Reduce[Nest[f,v,j]==Nest[f,vP,jP]&&  j>=jP,{vP}]
> should return vP=Nest[f,v,j-jP]
> Thanks

Calculation with objects of "symbolic" extent is different from the 
usual setup in Mathematica or other computer algebra systems. Another 
kind of calculus must be used.  For example I have written programs that 
deal with matrices of size nXn  where n is a symbol; one can demonstrate 
that the inverse of the nxn identity matrix
is itself.  One can also talk about block matrices etc.


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