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2019-01-04 08:33:08 +0100 asked a question Torsion subgroups of Jacobian over fields bigger than rationals.

I am interested to compute: ``torsion subgroups of Jacobian abelian variety J_0(p^2) defined over fields bigger than rationals."

The command: Upto p=11 it is fine after that if you give


gives the error:

``AttributeError                            Traceback (most recent call last)
<ipython-input-1-0f46a1a51624> in <module>()
      1 A = J0(Integer(169))
      2 A.qbar_torsion_subgroup()
----> 3 A.field_of_definition()
      4 J0(Integer(169)).qbar_torsion_subgroup().field_of_definition()"

Can somebody kindly tell me why Sage can compute upto p=11?

2018-01-20 07:52:53 +0100 asked a question Is it possible to write down matrix with variable row.

I wish to find out Moore Penrose psudo inverse of a matrix with variable row $4 \times k$ matrix with $k \in \mathbb{N}$ with entries a function of k. Is it possible to write down in SAGE?

2017-09-22 09:32:59 +0100 commented question Is it possible to implement ENDOHECKE IN SAGE

MAGMA is not good..showing run time you know how to implement the command: Chi28 := FullDirichletGroup(28); chi := Chi28.1*Chi28.2; Chi28; M28chi := CuspidalSubspace( ModularSymbols(chi, 2, 1)); M28chi; A := ModularAbelianVariety(M28chi); BrauerClass(M28chi);

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2017-09-21 17:52:12 +0100 asked a question Is it possible to implement ENDOHECKE IN SAGE

Alex Brown and Eknath Ghate implemented Endohecke. The links are here:

Is it possible to implement the programme in SAGE? Many thanks for your kind help.