During the last five years, after the first meeting on �Quaternionic Structures in Mathematics and Physics�, interest in quaternionic geometry and its applications has continued to increase.Progress has been made in constructing new classes of manifolds with quaternionic structures (quaternionic K�hler, hyper-K�hler, hyper-complex, etc.), studying the differential geometry of special classes of such manifolds and their submanifolds, understanding relations between the quaternionic structure and other differential-geometric structures, and also in physical applications of quaternionic geometry. Some generalizations of classical quaternion-like structures (like HKT structures and hyper-K�hler manifolds with singularities) appeared naturally and were studied. Some of those results are published in this book.Quaternionic Structures In Mathematics And Physics – Proceedings Of The Second Meeting is written by Marchiafava Stefano and published by World Scientific. ISBNs for Quaternionic Structures In Mathematics And Physics – Proceedings Of The Second Meeting are 9789812810038, 981281003X and the print ISBNs are 9789810246303, 9810246307.

