En réponse à Andreas Johansson <[log in to unmask]>: > > There are people who'd actually differentiate (when writting by hand) > between > f''' and f^III ? And _underlining_ vectors? Here, they got a macron-like > thing > _above_ in handwriting. I'd probably take an underlined thing to > indicate a > tensor, since that's the convention used by my mechanics teacher. > In France, in handwriting vectors are nearly always marked with an arrow above, and tensors with two (or three, or four, depending on the number of parameters) macrons. The people I've seen underlining vectors (a mechanics convention too in France) underline tensors twice or more. I find it rather good because it allows to see immediately how many "dimensions" the tensor has. Christophe. http://rainbow.conlang.free.fr It takes a straight mind to create a twisted conlang.