In that case I have written down:
e(r) cos(θ) sin(θ) e(x)
e(θ) -rsin(θ) rcos(θ) e(y)
2x1matrix = (2x2matrix)(2x1matrix)
Not aware of an easier way to represent matrices but hope that is clear enough.
I was thinking the same and thought it might be a diagonal metric that I was unaware of. All the information I have available to me is in question [1] is what I have scanned. It may be worth noting that there is a possibility that this was a botched question - the lecturer did mention once...
Homework Statement
[1]
(Low quality scan unfortunately: (1) contains Einstein notation for partial differentiation and (2) Einstein notation for the covariant derivative. e(r) and e(θ) are the components of v.)
[2]
[3]
Integral of (1-2m/r)^-1/2 dr, should be recognisable from...