This rigorous two-part treatment advances from functions of one variable to those of several variables.
The first part explores functions of one variable, including numbers and sequences, continuous functions, differentiable func.
Intended for students who have already completed a one-year course in elementary calculus, it defers the introduction of functions of several variables for as long as possible, and adds clarity and simplicity by avoiding a mixture of heuristic and rigorous arguments.
This rigorous two-part treatment advances from functions of one variable to those of several variables