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.Mon, 17 Jun 2013 11:31:16 +0200How to write twisted cubic in sage?https://ask.sagemath.org/question/8705/how-to-write-twisted-cubic-in-sage/Hello
could you please tell me how can I write twisted cubic
( {cost,sint | t in R}= v(x^2+y^2-1) )
in sage? should I use subscheme command and introduce it as an affine variety?Mon, 17 Jun 2013 09:12:12 +0200https://ask.sagemath.org/question/8705/how-to-write-twisted-cubic-in-sage/Comment by Neda for <p>Hello</p>
<p>could you please tell me how can I write twisted cubic</p>
<p>( {cost,sint | t in R}= v(x^2+y^2-1) )</p>
<p>in sage? should I use subscheme command and introduce it as an affine variety?</p>
https://ask.sagemath.org/question/8705/how-to-write-twisted-cubic-in-sage/?comment=17490#post-id-17490
should I introduce affine space then use v.rational_points( bound=..) ? Mon, 17 Jun 2013 11:31:16 +0200https://ask.sagemath.org/question/8705/how-to-write-twisted-cubic-in-sage/?comment=17490#post-id-17490Comment by calc314 for <p>Hello</p>
<p>could you please tell me how can I write twisted cubic</p>
<p>( {cost,sint | t in R}= v(x^2+y^2-1) )</p>
<p>in sage? should I use subscheme command and introduce it as an affine variety?</p>
https://ask.sagemath.org/question/8705/how-to-write-twisted-cubic-in-sage/?comment=17491#post-id-17491The twisted cubic in parametric form is:
var('t');
parametric_plot3d((t,t^2,t^3),(t,0,4),thickness=3)
Mon, 17 Jun 2013 10:54:10 +0200https://ask.sagemath.org/question/8705/how-to-write-twisted-cubic-in-sage/?comment=17491#post-id-17491Comment by vdelecroix for <p>Hello</p>
<p>could you please tell me how can I write twisted cubic</p>
<p>( {cost,sint | t in R}= v(x^2+y^2-1) )</p>
<p>in sage? should I use subscheme command and introduce it as an affine variety?</p>
https://ask.sagemath.org/question/8705/how-to-write-twisted-cubic-in-sage/?comment=17492#post-id-17492Your equation looks like a circle... What do you mean by "write" ? What do you want to do with your object ? Plot it ? Compute rational points ?Mon, 17 Jun 2013 10:32:34 +0200https://ask.sagemath.org/question/8705/how-to-write-twisted-cubic-in-sage/?comment=17492#post-id-17492