On May 18, 2:26 pm, Matt Bainbridge <[email protected]> wrote: > Is this a bug? > > sage: P.<t> = QQ[[]] > sage: p = 1+O(t) > sage: p(t) > 1 > sage: p(t^2) > 1 > > My understanding is that p(q) is p composed with q, so the above > output should be 1 + O(t) and 1 + O(t^2) respectively. >
I think it is a bug. sage: p.prec() 1 sage: p(t).prec() +Infinity sage: p(t^2).prec() +Infinity The precision of the composite is not being computed correctly. I hope someone more familiar with the power series code will jump in at this point. John Cremona > -- > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group > athttp://groups.google.com/group/sage-support > URL:http://www.sagemath.org -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
