Geometry of Black Holes and Multi-Black-Holes in 2+1 dimensions
  Lecture given at ``Raychaudhuri session," ICGC-95 conference, Pune (India), December 1995.   Contents:   I. Introduction   II. (2+1)-Dimensional Initial Values in Stereographic Projection   A. The single, non-rotating black hole   B. Non-rotating multi-black-holes   C. ``Black Hole" Universe Initial Values   III. Time Development: Enter the Raychaudhuri Equation   IV. Time Development in Stereographic Projection   A. The BTZ black hole spacetime   B. Multi-Black-Hole Spacetimes   V. Black Holes with Angular Momentum   VI. Analogous 3+1-Dimensional Black Holes   VII. Conclusions 
Dieter Brill