Recent content by Charles_Xu

Sorry, I meant the center is r=0 region of black hole. Some articles often states infinite density at r=0 due to zero volume the mass occupied, so infinite density is incorrect worded?

So we can't define the density ether? the density is infinite at center of black hole is incorrect?

Thank you for respond to my question, I believe the volume formula you mentioned here is only correct for flat spacetime, my question is how to define the volume inside event horizon.

What is the definition of volume inside a black hole? we know the grr element of Schwarzschild metric is negative inside event horizon, so how to define a volume inside event horizon? if there is no definition of volume, is there the definition of density?

Why does the Schwarzschild metric have a singularity at r=0 if it is only valid outside the spherically symmetric static mass?