Dear all,
I am trying to implement a class of polynomials with very large
exponents. For this, I'd like to reuse the functionalities offered by
sage/rings/polynomial/polydict.pyx.
The __init__ method of the class PolyDict has arguments
force_int_exponents and force_etuples that I don't fully understand. My
understanding of force_int_exponents is that if set to false, it allows
exponents to be something else than C int's. Yet, it does not work if
this is the intended behavior:
sage: from sage.rings.polynomial.polydict import PolyDict,ETuple
sage: PolyDict([(1,(2^32,))])
---------------------------------------------------------------------------
OverflowError Traceback (most recent call last)
...
OverflowError: value too large to convert to int
The problem comes from lines 90-99 of the file polydict.pyx, where
ETuple is used. And in the class ETuple, exponents have to be int's.
As a related side comment, the same lines force to work with ETuple,
regardless of the force_etuples argument value.
My questions: Is my understanding correct? If not, what are supposed
these arguments to be for? And if I understand correctly, is the
behavior I mention a bug?
Cheers,
Bruno
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