Since the radial coordinate and the tortoise coordinate are related by
r* = r + 2M Log (r/2M-1)
How can I write the derivative dF/dr* and d²F/dr*²?
Can they also be written in terms of the lambda(r) and/or nu(r) background functions?
2026-03-26 16:04:59.1774541099
How to relate a derivative in tortoise coordinates with the radial coordinate?
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