This book is devoted to geometric problems of foliation theory, in
particular those related to extrinsic geometry, modern branch of
Riemannian Geometry. The concept of mixed curvature is central to the
discussion, and a version of the deep problem of the Ricci curvature for
the case of mixed curvature of foliations is examined. The book is
divided into five chapters that deal with integral and variation
formulas and curvature and dynamics of foliations. Different approaches
and methods (local and global, regular and singular) in solving the
problems are described using integral and variation formulas, extrinsic
geometric flows, generalizations of the Ricci and scalar curvatures,
pseudo-Riemannian and metric-affine geometries, and 'computable' Finsler
metrics.
The book presents the state of the art in geometric and analytical
theory of foliations as a continuation of the authors' life-long work in
extrinsic geometry. It is designed for newcomers to the field as well as
experienced geometers working in Riemannian geometry, foliation theory,
differential topology, and a wide range of researchers in differential
equations and their applications. It may also be a useful supplement to
postgraduate level work and can inspire new interesting topics to
explore.