Kevin Ryde on Sun, 17 Aug 2014 11:30:07 +0200

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Re: Vec() and leading zeros of generating function

Thanks to all who replied!  So many ways ... :-)

valuation() or negative to Vec() sounds promising.  Yes the reverse too
as I almost always have a non-zero high term.  I start at x^0 so no
negative powers.

Ser() looks likely for comparing.  I'm all in rationals so would be
exact.  (Maybe complex number rationals in the future, but not yet.)