Basic Elements of Differential Geometry and Topology

I. Basic Concepts of Differential Geometry.- II. Tensors. Riemannian Geometry.- III. Basic Elements of Topology.- Appendices.- Appendix 1 The Simplest Groups of Transformations of Euclidean and Non-Euclidean Spaces.- Appendix 2 Some Elements of Modern Concepts of the Geometry of the Real World.- Appendix 3 Crystallographic Croups.- Appendix 4 Homology Groups and Methods of their Calculation.- Appendix 5 The Theory of Geodesics, Second Variation and Variational Calculus.- Appendix 6 Basic Geometric Properties of the Lobachevskian Plane.- Appendix 7 Selected Exerices on the Material of the Course.- Additional Material.- References.