The Mathematics of the Calendar


Book Description

This book will explain the mathematical details behind the Jewish calendar and Easter calculation with a mathematical proposal to fix the Jewish Calendar from an actuary.In addition, we will explore the mathematics behind the Mayan calendar, Islamic calendar, and our everyday calendar, the Gregorian calendar. First, I will demonstrate how the Jewish calendar works, and how to convert dates between the Jewish calendar to the Gregorian/Julian calendar. I will then explain the Easter calculation and demonstrate how to use the methods from the Easter calculation to fix the Jewish calendar so that the Jewish calendar stays consistent with the solar cycle. In 1582, there were two competing proposals to reform the Julian calendar. I will explain the mathematics behind the two proposals. I will explain the proposal that placed Washington, DC on the 77th meridian.




The Mathematics of the Gregorian Calendar


Book Description

Most of this book is based on codes assigned to each month of the year, to each year and to each century. Since Pope Gregory XIII replaced the Julian calendar with the Gregorian calendar on February 24, 1582, (and I don't know if he named after himself), the calendar has followed a cycle that makes it predictable. That's where you and I come in. The mathematics is based on an easily learned system called Modulo 7. The problems involve dates and are based an equation with involving 4 quantities. One of them will be unknown. In Task A, that will be the day of the week. If a carnival had a wheel with a spinner that had the 7 days of the week on them, wherever the spinner stops MUST be a day of the week. That is essentially modulo 7. There are no fractions. There are just seven numbers. Readers should know multiples of 7 to avoid having to look at the table.




Mathematics 2022: Your Daily Epsilon of Math


Book Description

Keep your mind sharp all year long with Mathematics 2022: Your Daily Epsilon of Math, a 12" × 12" wall calendar featuring 12 images relating to math concepts! Let mathematicians Rebecca Rapoport and Dean Chung tickle the left side of your brain by providing you with a math challenge for every day of the year. The solution is always the date, but the fun lies in figuring how to arrive at the answer, and possibly discovering more than one method of arriving there. Some of the most tricky problems require only middle school math applied cleverly. With entry-level algebra, word problems, math puns, and interesting math definitions added into the mix, this calendar will intrigue you for the whole year. End the year with more brains than you had when it began with Mathematics 2022: Your Daily Epsilon of Math.




Judaism, Mathematics, and the Hebrew Calendar


Book Description

The author explores several connections between mathematics and the history and tradition of Judaism, including the use of gematria to discover deeper meanings of words and phrases in the Torah. this book analysis the mathematical structure and properties of the Hebrew calendar, including probabilities assoiated with the calendar and computation of correspondences between Hebrew and civil dates. Intended for the scholar and layperson alike, this volume will appeal to reders with an interest in Judaism and/or mathematics.




Let's Play Math


Book Description







Mathematics 2022: Your Daily Epsilon of Math


Book Description

Keep your mind sharp all year long with Mathematics 2022: Your Daily Epsilon of Math, a 12" × 12" wall calendar featuring 12 images relating to math concepts! Let mathematicians Rebecca Rapoport and Dean Chung tickle the left side of your brain by providing you with a math challenge for every day of the year. The solution is always the date, but the fun lies in figuring how to arrive at the answer, and possibly discovering more than one method of arriving there. Some of the most tricky problems require only middle school math applied cleverly. With entry-level algebra, word problems, math puns, and interesting math definitions added into the mix, this calendar will intrigue you for the whole year. End the year with more brains than you had when it began with Mathematics 2022: Your Daily Epsilon of Math.




The Perfect Time


Book Description

In 1995, Mark Silen was playing around with simple math and working with calendars when he stumbled upon something so amazing that he began to question nearly everything he had ever been taught. In The Perfect Time: The Universal Calendar, Silen shares the results of his research into one of the biggest coincidences in historythat man could have potentially missed the perfect measurement of time by one day. Never in a million years did Silen think that seven numberstwo easy addition equations and six simple multiplication equationswould apply to so many disciplines, but as he began to create his Universal Calendar, he realized that many issues in religion, mathematics, science, and history could have been forever affected by the use of these seven, perfect numbers. As Silen shares an easy-to-understand system based on common knowledge and logic, he questions why we are still using a calendar system today that was created by people who thought the earth was flat. The fascinating system behind The Perfect Time: The Universal Calendar illustrates all the reasons why a new, more simplistic calendar could have a major impact on todays society and have more meaning than any other calendar in history.




The Structure and Mathematics of the Principal Calendars of the Western World


Book Description

This monograph studies the history, structure, and mathematics of calendars used in those parts of the world west of the Indian subcontinent. For the benefit of those interested in the mathematical principles involved, methods suitable for calculation with pen and paper are explained, while those merely desirous of the results can obtain them by means of the chapter devoted to computer programs.




Astronomy and Calendars – The Other Chinese Mathematics


Book Description

Presented from the viewpoint of the history of mathematics, this book explores both epistemological aspects of Chinese traditional mathematical astronomy and lunisolar calendrical calculations. The following issues are addressed: (1) connections with non-Chinese cultural areas; (2) the possibility or impossibility of using mathematics to predict astronomical phenomena, a question that was constantly raised by the Chinese from antiquity through medieval times; (3) the modes of representation of numbers, and in particular the zero, found in the context of Chinese calendrical calculations; and (4) a detailed analysis of lunisolar calendrical calculations. Fully worked-out examples and comparisons between the results of calculations and the content of Chinese historical calendars from various periods are provided. Traditional Chinese calendrical and mathematical astronomy consists of permanently reformed mathematical procedures designed to predict, but not explain, phenomena pertaining to astronomy and related areas. Yet, despite appearances, models of the mathematical techniques hidden behind this voluminous corpus reveal that they depend on a limited number of clear-cut mathematical structures. Although only a small fraction of these techniques have been fully studied, what is known surprisingly broadens our knowledge of the history of Chinese mathematics. Sinologists interested in the history of Chinese science, and anyone interested in the history of Chinese mathematics, the Chinese calendar, and the history of Chinese mathematical astronomy from its origin (104 BC) to its European reform (AD 1644) will find this book very useful. The present English language edition is a fully revised and updated version of the French original. Even though this is a research monograph in sinology, no particular sinological background is required, although a basic understanding of ‘concrete mathematics’ is needed. From the reviews of the French edition: This is a demanding, rigorous book to read ... worth the concentrated study it requires. The rewards are not only in the details but in the general overview that ...[it] provides. Joseph Dauben, EASTM, 2011 ...first Work in a Western language to turn to for anyone interested in the details of Chinese calendrical computations. Benno Van Dalen, ISIS, 2011 Martzloff’s careful scholarship and his overall look at the calendar beyond astronomical calculations, ..., make this book a most valuable contributions to a field of increasing interest. U. D’Ambrosio, Mathematical Reviews, 2013