Do you want the result of subs to live in a different ring? Then you should create a ring map and apply it.
On December 21, 2025 10:14:42 AM CST, Enrique Artal <[email protected]> wrote: >Not really, but it may help. I do not see why it idoes not work. > >El domingo, 21 de diciembre de 2025 a las 14:53:44 UTC+1, [email protected] >escribió: > >> On Sun, Dec 21, 2025 at 5:48 AM Enrique Artal <[email protected]> wrote: >> >>> I think that this code has been successful once: >>> R.<x, y> = QQ[] >>> T.<t> = QQ[] >>> sb = {x: t, y: t^2} >>> X = vector(R.gens()) >>> X.subs(sb) >>> >>> This one works: >>> >>> R.<x, y, z> = QQ[] >>> T.<t, t0, t1> = QQ[] >>> F = (y * z - x^2)^2 - x^3 * z >>> sb = {x:t^2, y:t^3 + t^4, z:1} >>> X = vector(R.gens()) >>> X.subs(sb) >>> >>> But the result is (x^2, x^4 + x^3, 1) >>> >>> What am I doing wrong >>> >> >> Do you need the ring T? >> >> >> R.<x, y, z, t> = QQ[] >> >> sb = {x:t^2, y:t^3 + t^4, z:1} >> >> X = vector([x,y,z]) >> X.subs(x=t^2, y=t^3 + t^4, z=1) >> >> works for me. >> >> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "sage-support" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> To view this discussion visit >>> https://groups.google.com/d/msgid/sage-support/3820340c-b09a-45bb-958b-f8403f094269n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/sage-support/3820340c-b09a-45bb-958b-f8403f094269n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> > >-- >You received this message because you are subscribed to the Google Groups >"sage-support" group. >To unsubscribe from this group and stop receiving emails from it, send an >email to [email protected]. >To view this discussion visit >https://groups.google.com/d/msgid/sage-support/16e72d04-b7c6-4ab3-9fbb-549018575067n%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/sage-support/137B5C4E-EA71-48F7-8FEA-5C8A55EC0B90%40gmail.com.
