[GAP Forum] Indeterminates
Matthew Fayers
m.fayers at qmul.ac.uk
Thu Jul 30 17:05:22 BST 2009
Dear forum,
I have a custom package containing lots of functions that I use frequently, that I usually read into GAP at the start of every session. Since I frequently use polynomials in one variable, one of the first lines of this package is
q:=Indeterminate(Rationals,"q");
The trouble is, if I modify the package and then re-read it into the session, GAP reads the line above again and assigns two indeterminates, both called q. This causes problems for functions that refer to q.
Is there a way around this, apart from closing a re-opening GAP every time I update my package? For example, is there a way to modify the above line so that it says something like "if q is not already assigned, let it be an indeterminate"?
Matt.
_____________________________________________________________________________________________
Matthew Fayers
School of Mathematical Sciences
Queen Mary, University of London
Mile End Road
London E1 4NS
020 7882 5479
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