*Science and Its Times*. ©2005-2006 Thomson Gale, a part of the Thomson Corporation. All rights reserved.

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**c. 400-c. 350 B.C.**

Greek mathematician known for his work on Pythagorean number theory. Thymaridas described prime numbers as "rectilinear" because they could only be represented as one-dimensional segments, whereas a figure such as 8 equated to a rectangle of 2 units by 4 units. He also developed a method of solving simultaneous linear equations called the "flower of Thymaridas."

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