#13165: Error multiplying modular forms of level Gamma1
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Reporter: davidloeffler | Owner: craigcitro
Type: defect | Status: new
Priority: major | Milestone: sage-5.2
Component: modular forms | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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The following was reported by Nadim Restom on sage-support
[https://groups.google.com/forum/?fromgroups#!topic/sage-
support/c-wjnYxAcn8 here]:
{{{
f = ModularForms(Gamma1(5),2).0
f*f
I am getting an error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_5.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8
-*-\\n" +
_support_.preparse_worksheet_cell(base64.b64decode("Zipm"),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmp9a_pAs/___code___.py", line 2, in <module>
exec compile(u'f*f
File "", line 1, in <module>
File
"/sagenb/sage_install/sage-5.0-boxen-x86_64-Linux/local/lib/python2.7
/site-packages/sage/modular/modform/element.py", line 1034, in __mul__
eps1 = self.character()
File
"/sagenb/sage_install/sage-5.0-boxen-x86_64-Linux/local/lib/python2.7
/site-packages/sage/modular/modform/element.py", line 423, in character
raise ValueError, "Form is not an eigenvector for <%s>" % g
ValueError: Form is not an eigenvector for <2>
}}}
Looks like line 1040 of sage/modular/modform/element.py is the culprit.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13165>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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