Quantum Riemannian Geometry

Differentials On An Algebra.- Hopf Algebras and Their Bicovariant Calculi.- Vector Bundles and Connections.- Curvature, Cohomology and Sheaves.- Quantum Principal Bundles and Framings.- Vector Fields and Differential Operators.- Quantum Complex Structures.- Quantum Riemannian Structures.- Quantum Spacetime.- Solutions.- References.- Index

Edwin J. Beggs studied mathematics at Churchill college Cambridge, moving to St Catherine's college Oxford to study for a DPhil under the supervision of Graeme Segal, finishing in 1988. He became a research assistant working with David Evans on operator algebras (giving a formula for the real rank of matrix valued functions) in Swansea and was appointed to a lectureship there. He has worked with Peter Johnson, finding the inverse scattering method for solitons in affine Toda field theory. He has worked with various coauthors on noncommutative differential geometry, introducing noncommutative sheaf theory, noncommutative complex structures and bar categories as well as working on bimodule connections and quantum Riemannian geometry. He also works on physics and computation in computer science.

Shahn Majid graduated from Cambridge, including Part III of the mathematics tripos, followed by a PhD at Harvard in 1988. After a year in Swansea, he spent ten years in DAMTP in Cambridge before moving to Queen Mary. He was one of the pioneers of the modern theory of Hopf algebras or quantum groups, introducing in his PhD thesis one of the two main classes at the time, the bicrossproduct ones associated to Lie group factorisations. Other results include the earliest models of quantum spacetime with quantum symmetry, the theory of Hopf algebras in braided categories and the dual/centre of a monoidal category. He was one of the coauthors of the theory of quantum principal bundles and introduced a frame bundle approach to quantum Riemannian geometry. In recent years he has been working on the bimodule approach with a view to quantum gravity.

"It is well written, nicely structured and, very importantly, illustrates all the noncommutative geometric concepts through a wide range of examples. This book should be accessible to both mathematicians and theoretical/mathematical physicists with an interest in noncommutative generalizations of differential geometry. Due to the many examples, and the exercises at the end of each chapter, this book may also be used for teaching a course on noncommutative differential and/or Riemannian geometry." (Alexander Schenkel, Jahresbericht der Deutschen Mathematiker-Vereinigung, Vol. 123, 2021)