Excuse me, I forgot the question: maybe there is simpler, but I do not understand where the error lies. Thank you in advance for your help
Le jeudi 6 février 2020 16:45:06 UTC+1, Jean-François Ingenbleek a écrit : > > I would just like to calculate the norm of the vector tangent to a curve > of Euclidean space. > I try this: > > [image: Capture 1.JPG] > > > with this error message > > [image: Capture 2.JPG] > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/b6667736-72b0-408a-ae4a-683135115c66%40googlegroups.com.
