ISBN-13: 9780821810088 / Angielski / Miękka / 1927 / 184 str.
Deals with the geometry of paths, the equations of the paths being a generalization of those of geodesics by the process. This book begins with a definition of covariant differentiation which involves functions $L DEGREESi_$ of the coordinates, the law connecting the corresponding functions in any two coordinate systems being funda