Numeral systems | Vigesimal numeral systems | Numerals
The Mayan numeral system was the system to represent numbers and calendar dates in the Maya civilization. It was a vigesimal (base-20) positional numeral system. The numerals are made up of three symbols; zero (a shell), one (a dot) and five (a bar). For example, thirteen is written as three dots in a horizontal row above two horizontal bars; sometimes it is also written as three vertical dots to the left of two vertical bars. With these three symbols, each of the twenty vigesimal digits could be written. Numbers after 19 were written vertically in powers of twenty. The Maya used powers of twenty, just as the Hindu–Arabic numeral system uses powers of ten. For example, thirty-three would be written as one dot, above three dots atop two bars. The first dot represents "one twenty" or "1×20", which is added to three dots and two bars, or thirteen. Therefore, (1×20) + 13 = 33. Upon reaching 202 or 400, another row is started (203 or 8000, then 204 or 160,000, and so on). The number 429 would be written as one dot above one dot above four dots and a bar, or (1×202) + (1×201) + 9 = 429. Other than the bar and dot notation, Maya numerals were sometimes illustrated by face type glyphs or pictures. The face glyph for a number represents the deity associated with the number. These face number glyphs were rarely used, and are mostly seen on some of the most elaborate monumental carvings. (Wikipedia).
The Mayan Number System: Writing Base 10 Numbers as Mayan Number (base 20)
This lesson explains how to write a base-10 number in base 20 and as a Mayan number. Site: http://mathispower4u.com
From playlist Historical Counting Systems
The Mayan Number System: Addition of Mayan Numbers
This lesson explains how to add Mayan numbers. Site: http://mathispower4u.com
From playlist Historical Counting Systems
The Mayan Number System: Writing Mayan Number in Base 10
This lesson introduces the Mayan number system and shows how to write Mayan number as base 10 numbers. Site: http://mathispower4u.com
From playlist Historical Counting Systems
This lesson explains how to determine numbers when written using Roman numerals and how to write numbers using Roman numerals. Site: http://mathispower4u.com
From playlist Roman Numerals
Ex: Write Numbers as Roman Numerals
This video explains how to write numbers when using Roman numerals. Site: http://mathispower4u.com
From playlist Roman Numerals
Ex: Write the Number for Roman Numerals
This video explains how to determine the number when it is written using Roman numerals. Site: http://mathispower4u.com
From playlist Roman Numerals
Multiplying Roman Numerals Like the Romans Did [Math Mini]
The Roman Numeral system is particularly different from our decimal number system in this key respect: it has no place value. Rather than represent values by some power of 10 (or otherwise), roman numerals represent value additively. Each symbol stands for a certain value, and to get the c
From playlist Math Mini
Hexadecimal explained | Higher than base-10 positional numeral systems
A digit is a single symbol that represents a number. In positional numeral systems, the base tells us how many distinct digits we have to express numbers using numerals. Base-2 has two digits. Base-3 has 3 digits, and this pattern holds all the way up to base-10 and beyond. What happens t
From playlist Data Science - Learn to code for beginners
The Life of Max Meyerhof through his correspondence - Isolde Lehnert
Scholarly Correspondences Among Orientalists during the Early and Late Modern Period as a Historical Source: A Series of Lectures. Topic: The Life of Max Meyerhof through his correspondence Speaker: Isolde Lehnert Date: March 17, 2023 Max Meyerhof, born in 1874 as the only son of a Germ
From playlist Historical Studies
Maya Lin, Vietnam Veterans Memorial
Maya Lin, Vietnam Veterans Memorial, 1982, granite, 2 acres within Constitution Gardens, (National Mall, Washington, D.C.), speakers: Dr. Beth Harris and Dr. Steven Zucker. Created by Beth Harris and Steven Zucker.
From playlist Expressionism to Pop Art | Art History | Khan Academy
From playlist CS50 Lectures 2015
Itza: A Forgotten History of the Maya
Most records of Mayan history were destroyed by the Spanish, but enough remain to divine the story of the mighty Itza, who ruled much of the Yucatan peninsula for a millennia. Today, Chichen Itza is one of Mexico's most spectacular archaeological sites. The History Guy remembers some forgo
From playlist Ancient and Prehistory
ANCIENT CIVILIZATIONS : Inca and Mayan Empires
A look at the Ancient Civilizations of the Inca and Maya Empires. Discover the gems of the 15th Century Incan empire, a domain which covered much of South America. The splendid cities of Curzo and Chairana and the grandeur of Machu Picchu captivated the imagination and, unfortunately, gree
From playlist History and Biographies
Numeral vs Number | Introducing numeral systems for programming beginners
What's the difference between the number 12 and the numeral 12? A numeral system is any writing system that allows us to express numbers using symbols. When we express a number using symbols, the result is called a numeral. When we express a number using a numeral, numeral is said to enc
From playlist Data Science - Learn to code for beginners
What Art tells us about Gender
There is a huge range of ways that gender has been understood and represented in the history of art. We look at a few examples that show us gender is a concept that has never been fixed: Hermaphroditos by the ancient Greeks, Titian's Venus of Urbino, Baule portrait masks, the photographs o
From playlist AP Art History - Themes Across Global Art History
Hexadecimal mechanical calculator from the 1970s
The Hexadder, made by Hexco Inc in the early 1970s. Sent to me by viewer Tom Carlson. Thanks Tom! This is episode 66 of my video series about old calculating devices. Original instructions PDF: http://cstaecker.fairfield.edu/~cstaecker/files/machines/filer.php?name=hexadderinstructions.p
From playlist Calculating Devices Review / HowTos
Quantum Transport, Lecture 19: Quantum Outlook
Instructor: Sergey Frolov, University of Pittsburgh, Spring 2013 http://sergeyfrolov.wordpress.com/ Summary: surface code, d-wave quantum computer, topological quantum computation. Quantum Transport course development supported in part by the National Science Foundation under grant DMR CAR
From playlist Quantum Transport
Apocalypse (Full Episode) | The Story of God with Morgan Freeman
Host Morgan Freeman examines what various faith traditions predict about the End of Days. He journeys to the desert where he pores over the Dead Sea Scrolls, and to Rome to decode the enigmatic Mark of the Beast: 666. A meditative session with one of Buddhism’s holiest men begins to realig
From playlist Full Episodes | National Geographic
Visualizing decimal numbers and their arithmetic 67 | Arithmetic and Geometry Math Foundations
This video gives a precise definition of a decimal number as a special kind of rational number; one for which there is an expression a/b where a and b are integers, with b a power of ten. For such a number we can extend the Hindu-Arabic notation for integers by introducing the decimal form
From playlist Math Foundations
THG Podcast: Forgotten Peoples: The Itza and Aksum
This is an episode of the THG Podcast, which posts to YouTube once every two weeks in addition to regular History Guy content, about a month after it releases to podcast services. Subscribe to the RSS feed: https://feeds.captivate.fm/thehistoryguy/ Check out our new community for fans and
From playlist Podcast