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 J0(169).qbar_torsion_subgroup().field_of_definition()  gives the error: AttributeError Traceback (most recent call last) in () 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 error..do 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); 2017-09-21 20:44:16 +0100 received badge ● Scholar (source) 2017-09-21 20:44:15 +0100 received badge ● Supporter (source) 2017-09-21 17:55:19 +0100 received badge ● Student (source) 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.