I am a little bit late to celebrate Einstein’s birthday. But here is my new paper that extends Einstein’s 4-d General Relativity to a 2-d spacetime model with new understanding and studies the black hole as a genuine 2-d object. Unfortunately, arXiv did not help again this time and put my submission on hold one more time. Most likely, they are going to reject it again like my last paper in a few weeks.
The new model predicts a neutron/quark star mass limit of less than 2.5 solar mass that is compatible with observation. For more massive stars, the ever softer equation of state in 4-d spacetime will eventually cause a core collapse to a temperature above 1016 GeV. The 4-d spacetime then undergoes phase transition to 2-d spacetime with much reduced degrees of freedom to re-stabilize the star as a true 2-d black hole.