On Jan 10, 7:04 pm, javier <vengor...@gmail.com> wrote: [...] > For instance if > you create a gap matrix (with integral coefficients) well, there no "static type" matrices in GAP (well, unless you work with, say, matrix Lie algebras, and have multiplication overloaded). They are just lists of lists of right sizes, with entries in a common ring.
I am surprised to hear that Sage is less flexible here (ok ,there could be, say, special matrices, say, dense numeric and bit matrices, that deserve a special treatment, but otherwise this seems strange...) > it gets converted > back into a list of lists and not into a sage matrix: > > sage: A = gap([[1,2],[2,3]]) > sage: A.IsMatrix() > true > sage: B = A.sage() > sage: B > [[1, 2], [2, 3]] > sage: type(B) > <type 'list'> > so I'd rather see Sage becoming more GAP-like in this sense, although I realise this may not happen soon or ever... Dmitrii
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