Locally inertial coordintates in GR refer to spacetime, not only to space, right?(adsbygoogle = window.adsbygoogle || []).push({});

Are they only defined for events, for spacetime points, so that when a particle is freely falling it passes through infinitely many such locally lorentz frames?

But if so, how can we say that the particle runs straight lines in each locally inertial frame?

???

thank you

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Local lorentz

**Physics Forums | Science Articles, Homework Help, Discussion**