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Fundamentals of university mathematics
[book]

2010

C h a p t e r 1 P r e l i m i n a r i e s All of the mathematics in this book is based on real numbers. Historically, mathematics began with the set of natural numbers (or positive integers) on which we have the operations of addition and multiplication. Much later, this set was extended by adding zero and the negative integers, thus giving the set of integers. In this set, subtraction is always possible, but division is only possible in certain cases. For example, we can divide 20 by 5, but

doi:10.1533/9780857092243
fatcat:cbqqs5xfzfddph4bxn6gubv4ba