2 problems

Consider the axially symmetric steady-state ansatz … with $l>-1$, $0<k<l+\frac{3}{2}$, and weighted norms involving … where $r(x)=\sqrt{x_1^2+x_2^2}$. Weighted-estimate conjecture.…

Around 1970, observations showed that the rotation velocities of stars in typical spiral galaxies were inconsistent with the gravitational potential of the visible matter alone. Da…