edited by Stancho Dimiev (Bulgarian Academy of Sciences, Bulgaria) & Kouei Sekigawa (Niigata University, Japan)

The Sixth International Workshop on Complex Structures and Vector Fields was a continuation of the previous five workshops (1992, 1994, 1996, 1998, 2000) on similar research projects. This series of workshops aims at higher achievements in studies of new research subjects. The present volume will meet with the satisfaction of many readers.

• Real Analytic Almost Complex Manifolds (L N Apostolova)
• Involutive Distributions of Codimension One in Kaehler Manifolds (G Ganchev)
• Three Theorems on Isotropic Immersions (S Maeda)
• On the Meilikhson Theorem (M S Marinov)
• Curvature Tensors on Almost Contact Manifolds with B-Metric (G Nakova)
• Complex Structures and the Quark Confinement (I B Pestov)
• Curvature Operators in the Relativity (V Videv & Y Tsankov)
• On Integrability of Almost Quaternionic Manifolds (A Yamada)
• and other papers