"The aim of this paper is to provide new characterizations of the curvature dimension condition in the context of metric measure spaces $(X,\mathsf d,\mathfrak m)$."
Gradient Flows(2nd Edition) Second Edition, In Metric Spaces and in the Space of Probability Measures (Lectures in Mathematics. ETH Zürich) by Professor Luigi Ambrosio, Nicola Gigli, GiuseppeSavare Paperback, 334 Pages, Published 2008 by Birkhäuser ISBN-13: 978-3-7643-8721-1, ISBN: 3-7643-8721-1
"The book is devoted to the theory of gradient flows in the general framework of metric spaces, and in the more specific setting of the space of probability measures, which provide a surprising link between optimal transportation theory and many evolutionary PDE's related to (non)linear diffusion. Particular emphasis is given to the convergence of the implicit time discretization method and to the error estimates for this discretization, ..."
"This volume collects the notes of the CIME course "Nonlinear PDE's and applications" held in Cetraro (Italy) on June 23-28, 2008. It consists of four series of lectures, delivered by Stefano Bianchini (SISSA, Trieste), Eric A. Carlen (Rutgers University), Alexander Mielke (WIAS, Berlin), and Cédric Villani (Ecole Normale Superieure de Lyon). They presented a broad overview of far-reaching findings and excitin ..."
"... it coincides with the closure in L2(μ;X) of the gradients of smooth functions and
with the closed cone generated by all optimal transport maps, thus with the
tangent space (10.4.1) we introduced in Section 8.4. Acknowledgements. During
the development of this project, that took almost three years, we had many useful
conversations with colleagues and friends on the topics treated in this book. In
particular we wish to thank Y.Br ..."