#10698: error in padic power series construction
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Reporter: wuthrich | Owner: roed
Type: defect | Status: new
Priority: major | Milestone:
Component: padics | Keywords: padic power series
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Here is an example of a bug in constructing a power series with
coefficient in an extension of Qp.
{{{
sage: A = Qp(3,5)
sage: Po.<X> = A[]
sage: f = Po([3,0,-1])
sage: K = f.root_field('a')
sage: a = K.gen()
sage: R.<T> = K[[]]
sage: b = A(0).add_bigoh(-1)
sage: b
O(3^-1)
sage: v = [a,b,b*a,b*(1+a)]
sage: v
[(1 + O(3^5))*a, O(3^-1), (O(3^-1))*a, (O(3^-1))*a + (O(3^-1))]
sage: R(v,4)
(1 + O(3^5))*a + O(T^4)
}}}
Note that the coefficients with low precision were just set to 0
{{{
sage: g = R(v,4)
sage: g[1][0].precision_absolute()
+Infinity
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10698>
Sage <http://www.sagemath.org>
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