Re-hello,
I find how to use retractIfCan(x)@Union(Integer, "failed"),
But I can't detect if the basis ring R is a complex one :
real and imag work in any *.input files, but can't compile even
if I add :
CTM ==> ComplexTrigonometricManipulations _
(Integer, Expression Complex Integer)
...
R is Complex Integer =>
imag arg::Expression Complex Integer)@CTM
...
The type of the variable arg is F inside the manip.spad file,
and I believe that << F = Expression Complex Integer >>
because << R is Complex Integer >> in this case.
But I can't coerce from F to Expression Complex Integer even if they are
equal.
The function imag is in ComplexTrigonometricManipulations...
I see it with )sh... but I can't use it in the *.spad file.
I continue to discover axiom...
Francois
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