What is this complex equation
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What is this complex equation

[From: ] [author: ] [Date: 11-05-27] [Hit: ]
I suspect its something from relativity. This may be what is called a metric in general relativity.......
ds^2= (1-2M/r)dt^2 - (1-2M/r)^-1dr^2-r@(d0^2 + sin^2 0 do^2), where units are chosen so that G = c =1 and where 0 ando are standard spherical polar coordinates.

ps o has a vertical line, 0 has a horizontal line which I could not put in.

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The "0 with horizontal line" is a greek "theta". The other symbol is a greek "phi".

It appears to be describing length along a curve, but since it is using time and space coordinates as the dimensions of that curve, I suspect it's something from relativity. This may be what is called a "metric" in general relativity.
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