The Great Mathematicians: Claudius Ptolemy

The world's greatest mathematicians you must know!! Let's get to know Claudius Ptolemy, who was a mathematician, astronomer, geographer, astrologer, scientist, and inventor of scientific instruments. Ptolemy's most important work is a set of 13 Greek textbooks called The Mathematical Collection, in which he collected and compiled various knowledge in detail and systematically. He also wrote textbooks on geography and drew maps describing different parts of the world. Ptolemy's important mathematical works are numerous, such as the use of chord tables to estimate pi in base sixty, the Ptolemy Theorem,