Katyayana (c. 3rd century BCE) was a Sanskrit grammarian, mathematician and Vedic priest who lived in ancient India.He is known for two works:
• The Varttika, an elaboration on Panini grammar. Along with the Mahabhasya of Patańjali, this text became a core part of the vyakarana (grammar) canon. This was one of the six Vedangas, and constituted compulsory education for students in the following twelve centuries.
• He also composed one of the later Sulba Sutras, a series of nine texts on the geometry of altar constructions, dealing with rectangles, rightsided triangles, rhombuses, etc.
In the tradition of scholars like Pingala, Katyayana was also interested in mathematics. Here his text on the Sulba Sutras dealt with geometry, and extended the treatment of the Pythagorean Theorem as first presented in 800 BC by Baudhayana.
