Solution generating theorems: perfect fluid spheres and the TOV equation
  We report several new transformation theorems that map perfect fluid spheres into perfect fluid spheres. In addition, we report new ``solution generating'' theorems for the TOV, whereby any given solution can be ``deformed'' to a new solution. 
Petarpa Boonserm (Victoria University of Wellington), Matt Visser   (Victoria University of Wellington), and Silke Weinfurtn...