Kaṇakkatikāram
Kaṇakkatikāram is a Tamil mathematics book believed to have been written by Kari Nayanar hailing from Korakaiyur in Cholanad. Considering the internal evidences, the work has been dated to 15th century CE. "It is significant that the mathematical methods found in these delve into the material life of the people and approach the dimensions of daily labor enumeratively." According to the author, the contents of the book are based on material available in standard Sanskrit treatises on mathematics like 'Līlāvatī".