How to change indeces of Sums created by powerseries?

Function: NICEINDICES (expr)
    will take the expression and change all the indices of sums and 
products to something easily understandable. It makes each index it can 
"I" , unless "I" is in the internal expression, in which case it 
sequentially tries J,K,L,M,N,I0,I1,I2,I3,I4,... until it finds a legal 
index.

Variable: NICEINDICESPREF
    default: [I,J,K,L,M,N] - the list which NICEINDICES uses to find 
indices for sums and products. This allows the user to set the order of 
preference of how NICEINDICES finds the "nice indices". E.g. 
NICEINDICESPREF:[Q,R,S,T,INDEX]$. Then if NICEINDICES finds that it 
cannot use any of these as indices in a particular summation, it uses 
the first as a base to try and tack on numbers. Here, if the list is 
exhausted, Q0, then Q1, etc, will be tried.


Fabian Schuh wrote:

>Hi all,
>
>my maxima installation uses I1-I* to name indeces of SUMs created by 
>powerseries:
>
>                             INF
>                             ====        I1  2 I1
>                             \      (- 1)   x
>(%o1)                         >     -------------
>                             /         (2 I1)!
>                             ====
>                             I1 = 0
>
>How do I change those I1 into "n" or maybe "k" ???
>
>Any help?
>
>Thx
>
>Greetings
>	-- Fabian Schuh
>  
>