Roger Penrose

English mathematical physicist, recreational mathematician and philosopher

impossible object

impossible object

non-periodic tiling of the plane

theorem

theorical process wherein energy can be extracted from a rotating black hole

graph whose edges are labelled with irreducible representations of a compact Lie group and whose vertices are associated with intertwiners of the edge representations adjacent to it

two-dimensional diagram that captures the causal relations between different points in spacetime

conjecture that, in general relativity, there is no naked singularity (i.e. one visible from future null infinity) generically

physical theory that encodes fields on Minkowski space into complex analytic objects on twistor space via the Penrose transform

cosmological model consisting of an infinite chain of FLRW spacetimes in which in which the future timelike infinity of one copy of FLRW spacetime is attached to the past conformal boundary of the next one

controversial hypothesis of a quantum origin of consciousness

in special relativity, the visual distortion of the appearance of a passing object moving at relativistic speeds

given a matrix A, the unique matrix B such that ABA = A, BAB = B, and that AB and BA are both Hermitian

Mathematical notation for tensors and spinors

philosophical argument based on the theory of relativity

graphical notation for multilinear algebra calculations

hypothesis

physical effect when bosonic field impinging on a rotating black hole

objective collapse theory that uncertainty in spacetime curvature causes collapse of the quantum state