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2012-06-06 21:17:13 +0200 | commented answer | How to check if a number field is a PID This seems to not work unfortunately, as you suspected. Note that I misstated my question. I asked about checking if the number field was a PID, when I meant to ask about checking if its ring of integers is. Nevertheless thanks for the suggestion. |
2012-06-06 21:17:13 +0200 | commented answer | How to check if a number field is a PID This seems to not work unfortunately, as you suspected. Note that I misstated my question. I asked about checking if the number field was a PID, when I meant to ask about checking if its ring of integers is. Nevertheless thanks for the suggestion. Example: sage: C = NumberField(x^2 + 1, 'i') sage: OC = C.ring_of_integers() sage: OC in PrincipalIdealDomains False |
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2012-06-06 19:28:05 +0200 | asked a question | How to check if a number field is a PID Given a NumberField, is there a way to check if its ring of integers is a PID? This could be with a built in method, analogous to is_noetherian(), but if there's a more complicated way to do it that's good too. |
2012-05-24 13:24:00 +0200 | asked a question | simon_two_descent error Hi. I'm having some difficulty with simon_two_descent, which is used to give bounds on the rank of elliptic curves. I'm running Sage 5.0 on Ubuntu 11.04 64bit. In Sage 4.7.2 I get a different error trying to do the same thing, for which I can provide details if needed. My objective is to compute the rank of an EllipticCurve over a specific number field. I am quite new to Sage so I am likely doing something wrong. Can someone please tell me how to fix this problem? Thank you. My code is as follows: |