Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

E.label() only works if E is defined over Q and has conductor within the range of the database (currently up to 300,000, but you have to install an optional spkg to get conductors over 10000).

In your case you wanted to treat n as a variable, so your E is (perhaps) defined over the function field Q(n); such a curve does not have a "Cremona label" -- I should know!