- #1
Buzz Bloom
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- I need some help with the notation in the equations in the Wikipedia article about the title subject.
The equations below are from
I am familiar with the dot on top of a variable as meaning d/dt, and the apostrophe as meaning d/dr (in this context). The dot on top of t, however, does not make any sense. I hope someone will explain this notation to me.
I am interested in the radial motion of a test particle relative to a black hole in a de Sitter universe. I want to compare this motion with the motion using just the Schwartzchild metric. Consequently the two terms involving θ and φ are irrelevant.
I am guessing that the dot might mean d/ds, but if that is correct, I would like to have it confirmed. The variable s is on the LHS of the metric in the form ds2.
I am familiar with the dot on top of a variable as meaning d/dt, and the apostrophe as meaning d/dr (in this context). The dot on top of t, however, does not make any sense. I hope someone will explain this notation to me.
I am interested in the radial motion of a test particle relative to a black hole in a de Sitter universe. I want to compare this motion with the motion using just the Schwartzchild metric. Consequently the two terms involving θ and φ are irrelevant.
I am guessing that the dot might mean d/ds, but if that is correct, I would like to have it confirmed. The variable s is on the LHS of the metric in the form ds2.
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