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Pi is an irrational number, meaning it cannot be expressed as a fraction from "summary" of A History of [pi] (pi) by Petr Beckmann

In the realm of mathematics, there exists a peculiar number known as Pi. This number, denoted by the symbol π, represents the ratio of a circle's circumference to its diameter. It is a fundamental constant that appears in various mathematical formulas and calculations. One intriguing aspect of Pi is its nature as an irrational number. An irrational number is defined as a number that cannot be expressed as a simple fraction. In the case of Pi, no matter how hard one may try, it is impossible to represent it as a ratio of two integers. This characteristic sets Pi apart from rational numbers, which can be expressed in the form of p/q, where p and q are integers. The concept of Pi being irrational has significant implications in the field of mathematics. It signifies that the decimal representation of Pi goes on indefinitely without repeating in a pattern. This infinite and non-repeating nature of Pi's decimal expansion distinguishes it from rational numbers, which exhibit periodicity in their decimal representations. Furthermore, the irrationality of Pi has been proven through rigorous mathematical proofs based on the principles of number theory and algebra. These proofs demonstrate that Pi cannot be written as a fraction and that its decimal representation is non-terminating and non-repeating.
  1. The irrationality of Pi adds a layer of complexity and mystery to this enigmatic number. It highlights the infinite and non-repeating nature of Pi's decimal expansion, making it a fascinating subject of study for mathematicians and scholars alike. The concept of Pi as an irrational number underscores the beauty and intricacy of mathematics, showcasing the richness and diversity of numerical patterns and constants.
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A History of [pi] (pi)

Petr Beckmann

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