Space-time diagrammatics
  We introduce a new class of two-dimensional diagrams, the \emph{projection diagrams}, as a tool to visualize the global structure of space-times. We construct the diagrams for several metrics of interest, including the Kerr-Newman - (anti) de Sitter family, with or without cosmological constant, and the Emparan-Reall black rings. 
Piotr T. Chru\'sciel, Christa R. \"Olz, Sebastian J. Szybka
gr-qc