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2. Timeline of mathematics - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_mathematics

   This is a timeline of pure and applied mathematics history.It is divided here into three stages, corresponding to stages in the development of mathematical notation: a "rhetorical" stage in which calculations are described purely by words, a "syncopated" stage in which quantities and common algebraic operations are beginning to be represented by symbolic abbreviations, and finally a "symbolic ...

3. Theoni Pappas - Wikipedia

   en.wikipedia.org/wiki/Theoni_Pappas

   Theoni Pappas (born 1944) [1] is an American mathematics teacher known for her books and calendars concerning popular mathematics. Pappas is a graduate of the University of California, Berkeley , and earned a master's degree at Stanford University .

4. List of calendars - Wikipedia

   en.wikipedia.org/wiki/List_of_calendars

   This is a list of calendars.Included are historical calendars as well as proposed ones. Historical calendars are often grouped into larger categories by cultural sphere or historical period; thus O'Neil (1976) distinguishes the groupings Egyptian calendars (Ancient Egypt), Babylonian calendars (Ancient Mesopotamia), Indian calendars (Hindu and Buddhist traditions of the Indian subcontinent ...

5. AOL Calendar - AOL Help

   help.aol.com/products/aol-calendar

   Calendar · Oct 28, 2023 Create, share, or subscribe to a calendar Learn how to stay in touch with the people in your life by creating, sharing, or subscribing to a calendar.

6. History of mathematics - Wikipedia

   en.wikipedia.org/wiki/History_of_mathematics

   1572–1585), virtually the same solar calendar used in modern times as the international standard calendar. [ 101 ] At roughly the same time, the Han Chinese and the Romans both invented the wheeled odometer device for measuring distances traveled, the Roman model first described by the Roman civil engineer and architect Vitruvius ( c. 80 BC ...

7. History of calendars - Wikipedia

   en.wikipedia.org/wiki/History_of_calendars

   Of all the ancient calendar systems, the Maya and other Mesoamerican systems are the most complex. The Mayan calendar had two years, the 260-day Sacred Round, or tzolkin, and the 365-day Vague Year, or haab. [56] A modern pictogram of the Mayan god Ahau, after which the 20th day of the tzolkin cycle was named