List of things named after Roger Penrose

This is a list of things named for the British scientist Roger Penrose:

Mathematics

• Moore–Penrose inverse, the most widely known generalization of the inverse matrix in particular linear algebra
• Penrose graphical notation, a visual depiction of multilinear functions or tensors
• Penrose stairs, impossible object (co-created with his father Lionel Penrose)
• Penrose tiling, an example of an aperiodic tiling
• Penrose triangle, impossible object (co-created with his father Lionel Penrose)
• Penrose unilluminable room, first solution to the illumination problem

Physics

• Diósi–Penrose model, possible solution to the measurement problem
• Geroch–Held–Penrose formalism
• Newman–Penrose formalism, a set of notation for general relativity
• Penrose diagram, a two-dimensional diagram capturing the causal relations between different points in spacetime
• Penrose inequality, estimation of the mass of a spacetime
• Penrose conjecture
• Penrose interpretation, speculation about the relationship between quantum mechanics and general relativity
• Penrose process, or Penrose mechanism, a theoretical means whereby energy can be extracted from a rotating black hole
• Penrose singularity theorem in general relativity
• Penrose transform, a complex analogue of the Radon transform in theoretical physics
• Penrose–Terrell effect, visual distortion according to the special theory of relativity
• Penrose–Ward correspondence
• Rietdijk–Putnam–Penrose argument, version of Rietdijk–Putnam argument

Other

• Penrose–Lucas argument, a logical argument
• Penrose tennis ball, 1995, a novel economical design in which the two halves that cup to form the ball very nearly tile the plane.