On 8 led, 12:12, mmarco <mma...@unizar.es> wrote: > Hi > > One of the skills that is studied in high-school and college is to > compute the domain of a real function of real variable given by a > formula. > > I haven't seen that implented in sage, so i plan to do so.
Hi, I wish you success, but I think that this is very hard task. Consider a function f(x) such that Sage canot solve equation f(x)==0 and now find the domain of the functions like ln(f(x)) or 1/f(x). For numerical way how to at least estimate domain of a function in one or two variables see [1] and [2] Robert [1] http://wood.mendelu.cz/math/maw-html/index.php?lang=en&form=df [2] http://wood.mendelu.cz/math/maw-html/index.php?lang=en&form=df3d > > In ordxer to do that, i would need some way to represent real > intervals (maybe with enpoints given by exact expressions, such as > exp(3), sqrt(7) or pi), and to compute intersections and unions of > them. > > So, my question is ¿is something like that available?. If it is not, i > could try to implement it too, ¿would it be best to do it as a new > class RealSubset or something like that? > > Thanks in advance. > > Miguel Marco -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
