ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Wed, 26 Dec 2012 07:56:53 +0100Does sage have analog of magma function IsIsomorphic?https://ask.sagemath.org/question/9651/does-sage-have-analog-of-magma-function-isisomorphic/Does Sage have analog of magma function [IsIsomorphic for curves](http://magma.maths.usyd.edu.au/magma/handbook/text/1253#13614)
> IsIsomorphic(C, D) : Crv, Crv -> BoolElt,MapSch
> Given irreducible curves C and D this
> function returns true is C and D are
> isomorphic over their common base
> field. If so, it also returns a scheme
> map giving an isomorphism between
> them. The curves C and D must be
> reduced. Currently the function
> requires that the curves are not both
> genus 0 nor both genus 1 unless the
> base field is finite.
or [IsIsomorphic for hyperelliptic curves](http://magma.maths.usyd.edu.au/magma/handbook/text/1391#15274)?
> IsIsomorphic(C1, C2) : CrvHyp, CrvHyp
> -> BoolElt, MapIsoSch
>
> SetVerbose("CrvHypIso", n): Maximum: 3
>
> This function returns true if and only if the hyperelliptic curves C1
> and C2 are isomorphic over their
> common base field. If the curves are
> isomorphic, an isomorphism is
> returned.petRUShkaWed, 26 Dec 2012 07:56:53 +0100https://ask.sagemath.org/question/9651/How to check two curves on birational equivalence?https://ask.sagemath.org/question/8443/how-to-check-two-curves-on-birational-equivalence/I have two curves, for example hyperelliptic:
y^2 = x^6 + 14*x^4 + 5*x^3 + 14*x^2 + 18
y^2 = x^6 + 14*x^4 + 5*x^3 + 14*x^2 + 5*x + 1
How to check them on birational equivalence (is able one curve be birationally transformed to another?) via Sage?petRUShkaSat, 05 Nov 2011 09:06:30 +0100https://ask.sagemath.org/question/8443/