'Prime numbers 2' diaporamas de présentation

CSCI 1900 Discrete Structures

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CPTR311 Discrete Structures

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Direct Proof and Counterexample III

Direct Proof and Counterexample III. Lecture 14 Section 3.3 Thu, Feb 3, 2005. Divisibility. Definition: An integer a divides an integer b if a ? 0 and there exists an integer c such that ac = b . Write a | b to indicate that a divides b .

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TYPES OF NUMBERS

TYPES OF NUMBERS. Natural Numbers: {1, 2, 3, 4, ...} This group of numbers starts at 1. It includes 1, 2, 3, 4, 5, and so on. Zero is not in this group. It has no negative numbers. There are no numbers with decimals. These are the first numbers that we learn.

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