This is a first textbook that is entirely focused on the up-to-date developments of null curves with their applications to science and engineering. It fills an

This book is about the light like (degenerate) geometry of submanifolds needed to fill a gap in the general theory of submanifolds. The growing importance of li

This book provides an upto date information on metric, connection and curva ture symmetries used in geometry and physics. More specifically, we present the char

This volume contains original papers and announcements of recent results presented by the main participants of the 5th International Colloquium on Differential