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binary_cubic_coefficients_from_invariants not working? [closed]

asked 2024-03-10 23:13:59 +0200

updated 2024-03-11 16:13:11 +0200

Max Alekseyev gravatar image

I'm trying to use the function binary_cubic_coefficients_from_invariants from sage.rings.invariants.reconstruction. I tried the example at the documentation for Reconstruction of Algebraic Forms (top of page), which works as shown, and produces the cubic form (0, 1, -1, 0) as shown. However, using any other discriminant (other that 0) in the function call produces the same form. So for example

sage: binary_cubic_coefficients_from_invariants(4)
(0, 1, -1, 0)

sage: binary_cubic_coefficients_from_invariants(-4)
(0, 1, -1, 0)

sage: binary_cubic_coefficients_from_invariants(108)
(0, 1, -1, 0)

I tried in Sage 10.2 for Mac OS x86 and in SageCell, with the same results in both.

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Closed for the following reason the question is answered, right answer was accepted by Max Alekseyev
close date 2024-05-05 17:42:05.662845

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Please submit a bugreport at https://github.com/sagemath/sage/issues

Max Alekseyev gravatar imageMax Alekseyev ( 2024-03-11 16:13:40 +0200 )edit
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Bug report #37933 submitted.

Allen Stenger gravatar imageAllen Stenger ( 2024-05-04 23:19:25 +0200 )edit

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answered 2024-05-05 15:46:24 +0200

updated 2024-05-05 17:41:36 +0200

Max Alekseyev gravatar image

I've changed this to a bug report, so no answer is needed. https://github.com/sagemath/sage/issu...

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Asked: 2024-03-10 23:13:59 +0200

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Last updated: May 05