- #1
rbwang1225
- 112
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Hello!
Is any covariant vector orthogonal to absolute derivative of its contravariant counterpart?
I read a GR book, and it says the tangent vector of a curve is orthogonal to its absolute derivative, that is ##D\lambda^A/dst_A=0##, where ##t^A## is the unit tangent vector of some curve ##\gamma##.
Any comments would be appreciated.
Is any covariant vector orthogonal to absolute derivative of its contravariant counterpart?
I read a GR book, and it says the tangent vector of a curve is orthogonal to its absolute derivative, that is ##D\lambda^A/dst_A=0##, where ##t^A## is the unit tangent vector of some curve ##\gamma##.
Any comments would be appreciated.
