Hi Nils, On 2019-12-02, Nils Bruin <nbr...@sfu.ca> wrote: > On Monday, December 2, 2019 at 3:18:20 PM UTC-8, Michael Orlitzky wrote: >> >> Who do I have to make a campaign donation to if I want this to be the >> default? >> > > The Society for the Prevention of Predictable Performance would be a good > place to start. > > Trying to find a radical expression for an algebraic number can be pretty > expensive and, of course, may fail: > > sage: QQbar.options.display_format="radical" > sage: QQbar['x'](x^5+x+3).roots() > [(-1.132997565885066?, 1), > (-0.4753807566695497? - 1.129701725095409?*I, 1), > (-0.4753807566695497? + 1.129701725095409?*I, 1), > (1.041879539612083? - 0.822870338109958?*I, 1), > (1.041879539612083? + 0.822870338109958?*I, 1)] > > so I don't think it will ever be a default.
Hang on, does that mean that with display_format="radical", Sage will show a radical expression when it finds one, and will show numerical noise when it finds none (i.e., it does not simply raise an error)? Indeed: sage: QQbar['x'](((x^2+3)*(x^2-3)*(x^2+15)).expand()).roots() [(-sqrt(3), 1), (sqrt(3), 1), (-I*sqrt(15), 1), (-I*sqrt(3), 1), (I*sqrt(3), 1), (I*sqrt(15), 1)] That's actually quite nice! So, it would be a good default -- if performance wouldn't be a problem. Anyway, thank you for pointing to this option, because I wasn't aware that it exists and would have liked to use it from time to time. Best regards, Simon -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/qs5jmj%242oo5%241%40blaine.gmane.org.
