Recent content by qiuhd

Thanks, Can you give me a example of commutation relations in physics? and what is TOE?

Thanks, most differential geometry and Riemann geometry textbooks contain Lie group material, I thought they have something to do with GR.

I know we need metric, curvature, what is Lie algebras used for? What is the physics meaning?

If we accelerate a nuclear bomb to 0.999c, then detonate it, will the exploration release more energy? because the mass difference caused by the exploration maybe increased.

I think Invariance of Spacetime Interval come form the invariance of the speed of light. p1---------------mid---------------p2 ------------------A ------------------B--> Suppose at time t1 there were two light flashes occurred on p1 and p2. A stayed still at the middle point at time t2 A saw...