3 problems

The electrical and gravitational force scales between a proton and an electron have a ratio of about $10^{40}$ today, while the corresponding ratio of characteristic size scales in…

Let $\nu$, $\gamma$, and $\beta$ be the parameters of the static system for self-gravitating polytropic elastic balls, and let $\mathcal{O}$ denote the domain of parameter values f…

Finite-origin solution conjecture. There may exist solutions of these field equations that remain finite at $r=0$. The conjecture is motivated by the strong nonlinearity of the fie…