Changes

in sign convention used in physics, where times are considered to be positive and distances negative.  

in sign convention used in physics, where times are considered to be positive and distances negative.  

:<math>g_{oo}</math>

:<math>g_{oo}</math> in both notations is time-time component of metric of spacetime, which means that  

 

in both notations is time-time component of metric of spacetime, which means that  

:<math>E=mc^2 \sqrt{g_{oo}(x)}</math>  

:<math>E=mc^2 \sqrt{g_{oo}(x)}</math>