On Fri, Feb 6, 2009 at 8:58 AM, beppe <giuseppe.molt...@gmail.com> wrote: > > Hello, > I'm novice in SAGE but I have a strange problem: > I have to compute some eigenvalues for the set of cuspidal newforms > for the group Gamma0(15), weight 4 and Legendre character chi of > conductor 5, so I type in SAGE the following set of instruction: > > SAGE: chi=DirichletGroup(11,QQ).1 > SAGE: m=numerical_eigenforms(chi,4); m > Numerical Hecke eigenvalues for [1,-1] of weight 4 > SAGE: m.ap(2) > > This instruction produces a crash: in notebook the system answers: > /usr/local/sage/local/bin/sage-sage: line 352: 4080 Illegal > instruction > python "$@" > > In SAGE command line mode this set of instructions produces a similar > crash. > Some could help me? I thank you in advance, > Beppe >
You downloaded the wrong binary. Fixes: (1) download the right binary, if there is one available, or (2) use the public sage notebook server (sagenb.org), or (3) build sage from source. Second your code contains a bug: chi=DirichletGroup(11,QQ).1 should be chi=DirichletGroup(11,QQ).0 since the indexing in sage is 0 based. Third, that space as dimension 0. But if you chi=DirichletGroup(11,QQ).0^2 you get something of dimension 4. Here's some examples of how things were when you have a binary for the right machine: sage: chi=DirichletGroup(11,QQ).0^2 sage: m=numerical_eigenforms(chi,4); m sage: m.ap(2) [9.0, 9.0 + 2.77555756156e-17*I, 2.73205080757 + 1.23504195035e-16*I, -0.732050807569 - 2.08519811694e-15*I] sage: dimension_modular_forms(chi^2,4) 4 sage: m.ap(3) [28.0, 28.0 - 1.66533453694e-16*I, -7.92820323028 + 3.91694614232e-15*I, 5.92820323028 - 5.96234312405e-16*I] sage: ModularForms(chi,4) Modular Forms space of dimension 4 for Congruence Subgroup Gamma0(11) of weight 4 over Rational Field sage: ModularForms(chi,4).basis() [ q + 3*q^3 - 6*q^4 - 7*q^5 + O(q^6), q^2 - 4*q^3 + 2*q^4 + 8*q^5 + O(q^6), 1 + O(q^6), q + 9*q^2 + 28*q^3 + 73*q^4 + 126*q^5 + O(q^6) ] -- William --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
