Ticket #4357 (assigned enhancement)

Opened 3 months ago

Last modified 2 months ago

modular forms -- new subspace used to work and now broken

Reported by: was Assigned to: craigcitro (accepted)
Priority: major Milestone: sage-3.4
Component: modular forms Keywords:
Cc:

Description

This used to work and is now broken. It is used in my modular forms book. 

sage: CuspForms(45).new_subspace()
Traceback (most recent call last):
...
NotImplementedError: computation of new submodule not yet implemented

Change History

10/24/2008 03:14:35 AM changed by zimmerma

  • summary changed from modualr forms -- new subspace used to work and now broken to modular forms -- new subspace used to work and now broken.

10/27/2008 12:50:16 PM changed by craigcitro

  • status changed from new to assigned.

This functionality was removed because it was broken. Indeed, the result returned in William's book is incorrect -- it should be: 

CuspForms(Gamma0(45), 2, prec=14).new_subspace().basis()
(q + q^2 - q^4 - q^5 - 3*q^8 - q^10 + 4*q^11 - 2*q^13 + O(q^14),)

William and I have discussed a fix for this, which I'll take care of soon, unless William beats me to it.