Topics: models, economics, Market equilibrium, tax, Sets, Functions, Graphs, equations, Sequences, Limits, first-order recurrence, elements of finance, Interest, capital growth, cobweb model, calculus, special function, Powers, exponential function, logarithm function, Trigonometrical, Elasticity of demand, 2 Profit maximisation, derivative in economics, derivatives, Matrices, Equations, Vectors, preferences, convexity