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※ This video is part of the <Documentary Prime - Numbers Part 1: Pi in the Sky> broadcast on November 2, 2015. A book that was put up for auction in 1999. An anonymous collector who recognized the value of this prayer book that seemed like it would crumble if touched bought it for about 2.2 billion won. The book was soon handed over to Dr. William Noel, a restorer of ancient books. He realized that there was another book hidden inside the prayer book. However, it took several more years before he could encounter that secret book. When he developed special equipment and shined light on the parchment, the hidden writing was revealed. Dr. William Noel intuitively felt that what he was seeing before his eyes was more amazing than he had expected. Another book hidden inside the prayer book was Archimedes' treatise. Mathematicians from ancient Egypt, Greece, and China, and even Leonardo da Vinci from the Renaissance, continued their efforts to solve the problem of circles and squares in different times and spaces. The secret code to solve the problem of drawing a square with the same area using only a ruler and compass was piπ, the ratio of the diameter and the circumference. The clue is in Archimedes' paper. There was also a mathematician who used Archimedes' method of estimating the value of pi using polygons to find the value of pi using a 2^62 (4611686018427387904)-gon. 3.14159265358979... Could mathematicians conquer this mysterious number whose end is unknown? ✔ Program name: Documentary Prime - Numbers Part 1: Pi π, the number in the sky ✔ Broadcast date: 2015.11.02 #GolladunDocumentary #DocumentaryPrime #Mathematics #Humanity #History #Civilization #InfiniteDecimal #IrrationalNumber