Do you know a correct way to typeset the diagonal line in the upper left cell of a table like this: -------------------------- |\ k | | | | \ | 1 | 2 | |n \ | | | ---------------- | | | | | 1 | | | | | | | ---------------- | | | | 2 | | | | | -------------- ? Sergei Duzhin http://www.pdmi.ras.ru/~duzhin