It seems the change in behaviour was introduced in
https://trac.sagemath.org/ticket/21827. In the mean time, one might want
to set the order to positive infinity:
sage: var('x y0 y1')
(x, y0, y1)
sage: y0.series(x)
1*x + Order(x^20)
sage: y0.series(x, +oo)
(y0)
I am not familiar with Pynac internals, so I am not sure what should be
the fix.
Regards,
TB
On 30/03/17 23:36, Tobias Rossmann wrote:
Hi,
the following behaviour of Sage 7.5.1 and 7.6 (Ubuntu 16.04.1, 64-bit)
is unexpected:
sage: var('x y0 y1')
(x, y0, y1)
sage: y0.series(x)
1*x + Order(x^20)
sage: y1.series(x)
(y1)
Version 7.4 works fine.
Best,
Tobias
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