## A History of the Circle: Mathematical Reasoning and the Physical UniverseThe concept of the circle is ubiquitous. It can be described mathematically, represented physically, and employed technologically. The circle is an elegant, abstract form that has been transformed by humans into tangible, practical forms to make our lives easier. And yet no one has ever discovered a true mathematical circle. Rainbows are fuzzy; car tires are flat on the bottom, and even the most precise roller bearings have measurable irregularities. Ernest Zebrowski, Jr., discusses why investigations of the circle have contributed enormously to our current knowledge of the physical universe. Beginning with the ancient mathematicians and culminating in twentieth-century theories of space and time, the mathematics of the circle has pointed many investigators in fruitful directions in their quests to unravel nature's secrets. Johannes Kepler, for example, triggered a scientific revolution in 1609 when he challenged the conception of the earth's circular motion around the sun. Arab and European builders instigated the golden age of mosque and cathedral building when they questioned the Roman structural arches that were limited to geometrical semicircles. Throughout his book, Zebrowski emphasizes the concepts underlying these mathematicians' calculations, and how these concepts are linked to real-life examples. Substantiated by easy-to-follow mathematical reasoning and clear illustrations, this accessible book presents a novel and interesting discussion of the circle in technology, culture, history, and science. |

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#### LibraryThing Review

User Review - fpagan - LibraryThingMostly high-school level, but deigns to display a few differential equations in the second half. Has the usual afflictions of pre-metric units and overleaf figures. Read full review

#### A history of the circle: mathematical reasoning and the physical universe

User Review - Not Available - Book VerdictAfter Zebrowski's well-received Perils of a Restless Planet (LJ 7/97), this new book is a disappointment. Only partially about circles, the text aims "to examine [for the general reader] the broader ... Read full review

### Contents

The Quest for Pi | 1 |

Rollers Wheels and Bearings | 14 |

The Celestial Clock | 26 |

Mathematics and the Physical World | 39 |

Charting the Planet | 51 |

Surface and Space | 68 |

Celestial Orbs | 86 |

From Conics to Gravity | 104 |

Waves | 144 |

Artificial and Natural Structures | 166 |

The Real and Conjectured Universe | 184 |

Formulas for the areas of common shapes | 201 |

Formulas for the volumes of common solids | 202 |

Algebraic equations for the conic sections | 203 |

Notes | 205 |

211 | |

### Other editions - View all

A History of the Circle: Mathematical Reasoning and the Physical Universe Ernest Zebrowski No preview available - 1999 |

A History of the Circle: Mathematical Reasoning and the Physical Universe Ernest Zebrowski No preview available - 1999 |

A History of the Circle: Mathematical Reasoning and the Physical Universe Ernest Zebrowski No preview available - 1999 |