gravity in 2d and 3d
30 Jan 2013Why can’t gravity rotate galaxy images in gravitational lensing, but introduce physical rotation of galaxies?
bonus question: Where’s the global minimum of \(x^x\), \(x>0\)?
Why can’t gravity rotate galaxy images in gravitational lensing, but introduce physical rotation of galaxies?
bonus question: Where’s the global minimum of \(x^x\), \(x>0\)?