Hi Leonid

I started working on rs_series and have encountered some difficulties.

I have to use rs_series_inversion in order to perform some division. The 
problem is that series inversion doesn't always work.
For example:

R, x, y = ('x, y', QQ)
rs_series_inversion(x + x*y, 4)

This throws an NotImplementedError.

Would you have any advice on this? I was thinking about catching the 
exception and just using 1/p in that case.

Bests

Cédric







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