Algebraic varieties -- Dimension -- Regular and rational functions on algebraic varieties

Consequences -- 1.3.Exercises -- 2.Diagrams -- 2.1.Graphs -- 2.2.Exercises -- 3.Functions -- 3.1.Functions -- 3

theory -- Functions -- Relations -- Counting and probability -- Graphs and trees -- Analysis of algorithm

to quadratic equations. The nature of the roots. Graphs and functions. Absolute values. Linear