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hello I'm korean high school student and sorry for my poor English.

I saw ## t_0=t_f\sqrt{1 -\frac{ 2GM}{rc^2}} ## in wikipedia.

does ## \sqrt{1 -\frac{ 2GM}{rc^2}} ## of this equation have name like lorentz factor ## \frac{1}{\sqrt{1 -\frac{v^2}{c^2}}} ##of ## t=\frac{t_0}{\sqrt{1 -\frac{v^2}{c^2}}} ## ?

or is it just called time dilation equation?

I just want to know if there is a word specifically referring to factor ## \sqrt{1 -\frac{ 2GM}{rc^2}} ##.

I saw ## t_0=t_f\sqrt{1 -\frac{ 2GM}{rc^2}} ## in wikipedia.

does ## \sqrt{1 -\frac{ 2GM}{rc^2}} ## of this equation have name like lorentz factor ## \frac{1}{\sqrt{1 -\frac{v^2}{c^2}}} ##of ## t=\frac{t_0}{\sqrt{1 -\frac{v^2}{c^2}}} ## ?

or is it just called time dilation equation?

I just want to know if there is a word specifically referring to factor ## \sqrt{1 -\frac{ 2GM}{rc^2}} ##.

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