What is your sage version? How did you install it? Did you open an issue on github?
Best Vincent On Tue, 26 Sept 2023 at 07:00, John H Palmieri <jhpalmier...@gmail.com> wrote: > > Setup: > > sage: F = GF(2, impl='ntl') > sage: m_ntl = identity_matrix(1, F) > sage: v_ntl = vector(F, (1,)) > > Now consider > > sage: m_ntl * v_ntl > sage: v_ntl * m_ntl > > I'm trying to multiply a 1x1 matrix by a 1-dimensional vector, in one order > or the other. Here's what happens: the first line fails with a SignalError, > and the second actually crashes Sage. If we are defining a field that can't > do linear algebra, shouldn't there be big warnings posted somewhere? If we > are defining a field like this, are there any expectations that it should > work broadly with Sage types and constructions? I just discovered that cup > products in mod 2 cohomology don't work when "mod 2" means coefficients in > GF(2, impl='ntl'), and I don't know if I should bother trying to fix this. > > For what it's worth, I get the same with `GF(2, impl='givaro')`. Also for > what it's worth, explicitly converting `v_ntl` to a matrix allows the matrix > multiplication to work. > > I see this on two different OS X machines, one Intel and one Apple Silicon. > > -- > John > > -- > 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 view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/faeffb72-3b16-4f37-90c4-f969e4d5c017n%40googlegroups.com. -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/CAGEwAAm37d_yY%2B7AYbUV2dtVwXBGwE412yLGjcPi1wSCO%2BjfvA%40mail.gmail.com.
