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Nov22-04, 11:39 AM
What is this object they are describing? As I said earlier the only object I can see that they are describing is a pair of dual vectors, but from it's very name you can see that we think of this object as two differet objects!
I don't think you have read the link
. When you look at the drawing you see the object P and his covariant en contravariant expression. So one object two expressions!