Recent content by lync4495

Oh ok. Thank you. I wasn't realizing the metric tensor was a function of time. Now that I think about it, it makes sense that it is.

Hello, I'm beginning to learn GR and ran across the following in the beginning of Stephani's book. In deriving the equations of motion for a force-free particle, we have the Lagrangian: L = \frac{m}{2} g_{\alpha \beta} \dot{x}^\alpha \dot{x}^\beta To construct the equations of motion...