Hello, We currently have two much implementation of 2x2 matrices. I found at least three that leads to distinct element classes
sage: M1 = SL2Z sage: M2 = MatrixSpace(ZZ,2) sage: from sage.matrix.matrix_integer_2x2 import MatrixSpace_ZZ_2x2 sage: M3 = MatrixSpace_ZZ_2x2() sage: m1 = M1([2,1,1,1]) sage: m2 = M2([2,1,1,1]) sage: m3 = M3([2,1,1,1]) SL2Z is mostly used in code related to modular forms. And I found only one place where MatrixSpace_ZZ_2x2 is used. I would like to: - try to remove the special class we have for SL2Z (or at least inherit from the generic 2x2 integer which is faster and interacts nicely with the rest of matrix code) - make the MatrixSpace_ZZ_2x2 be the default when we call "MatrixSpace(ZZ,2)". I wanted to ask about opinions before starting. Vincent PS: benchmark sage: %timeit m1**1001 1000 loops, best of 3: 237 µs per loop sage: %timeit m1*m1 100000 loops, best of 3: 14.8 µs per loop sage: %timeit m2**1001 10000 loops, best of 3: 74.4 µs per loop sage: %timeit m2*m2 100000 loops, best of 3: 4.4 µs per loop sage: %timeit m3**1001 10000 loops, best of 3: 19.3 µs per loop sage: %timeit m3*m3 1000000 loops, best of 3: 847 ns per loop -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
