* Eviatar <eviatarb...@gmail.com> [2011-12-16 20:22:37 -0800]: > sage: n(pi - 3).n(prec=2) > 0.12 This approximates n(pi - 3) using two bits of precision so this should not be too surprising: sage: n(pi - 3) 0.141592653589793 sage: n(_, prec=2) 0.12
> sage: n(pi - 3, prec=2) > 0.00 This approximates both pi and 3 with two bits of precision and then computes their difference: sage: n(pi,prec=2),n(3,prec=2) (3.0, 3.0) There's already a ticket #12120 which tries to improve the documentation of n() to make this behaviour more clearly documented. (I see that by now you've already found that ticket yourself) julian
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