Discrete Mathematics and Its Special Branches. Textbook

The purpose of this textbook is the presentation of not very large in volume, but sufficient to understand the material in discrete mathematics and its special sections for students of the first and (mainly) second courses of the university.
The publication was prepared on the basis of federal state educational standards (Federal State Educational Standard) in accordance with the working (educational) programs of the Moscow State Linguistic University to send the preparation of undergraduate Information Security for the directions of preparing undergraduate Information security, "Applied Informatics "," Business Informatics" (profile "IT management in business").
The work of the authors was distributed as follows: Part I was created by I. A. Kirillov, part II, the material of which was taught at FSBEI in the Russian State Humanitarian University (RSUSU) and MosSU - M.V. Sheptunov, preface And the conclusion was written by the authors together