November 23, or 11.23, is often called Fibonacci Day because it has the first four terms of the Fibonacci Sequence: 1, 1, 2, 3, 5, 8, 13, 21, 34 .... How about #PingalaDay? No disrespect to Fibonacci, but the Indian mathematician and poet #Pingala wrote about the numbers some 1300 years earlier. He also wrote about Pascal's Triangle (1800 years pre-Pascal) and was the first to use binary numbers! (Pingala image from one of my fave websites, @mathigon.) #ITeachMath #MTbos #MultiverseOfMathness

Nov. 23, or 11.23, is often called Fibonacci Day because it has the first four terms of the Fibonacci Sequence: 1, 1, 2, 3, 5, 8, 13, 21, 34 .... How about #PingalaDay? No disrespect to Fibonacci, but the Indian mathematician and poet #Pingala wrote about the numbers some 1300 years earlier.
He also wrote about Pascal's Triangle (1800 years before Pascal) and was the first to use binary numbers! (Pingala image from one of my fave websites, @mathigon.) #ITeachMath #MTbos #MultiverseOfMathness