Doug McNutt wrote:
A word of caution:
Just as in "vector operators" had their names changed to pacify the
> mathematicians - thank you - there is a conflict in terms. Covariant and > contravariant tensors are the meat of Einstein's formulation of relativity. > It all has to do with transformations being in the same direction or the > opposite direction as the coordinate differentials. Perhaps there is some > similarity.
Yes, that's what is meant by these two words. But of course the concrete meaning depends on the subject area. The above is from tensor algebra. Mine is from type theory.
Einstein's presentation is a whole lot easier to understand than the one above.
Sorry, I make a second attempt in another reply. -- TSa (Thomas Sandlaß)
