<P> The Shulba Sutras or Śulbasūtras (Sanskrit śulba: "string, cord, rope") are sutra texts belonging to the Śrauta ritual and containing geometry related to fire - altar construction . </P> <P> The Shulba Sutras are part of the larger corpus of texts called the Shrauta Sutras, considered to be appendices to the Vedas . They are the only sources of knowledge of Indian mathematics from the Vedic period . Unique fire - altar shapes were associated with unique gifts from the Gods . For instance, "he who desires heaven is to construct a fire - altar in the form of a falcon"; "a fire - altar in the form of a tortoise is to be constructed by one desiring to win the world of Brahman" and "those who wish to destroy existing and future enemies should construct a fire - altar in the form of a rhombus". </P> <P> The four major Shulba Sutras, which are mathematically the most significant, are those attributed to Baudhayana, Manava, Apastamba and Katyayana . Their language is late Vedic Sanskrit, pointing to a composition roughly during the 1st millennium BCE . The oldest is the sutra attributed to Baudhayana, possibly compiled around 800 BCE to 600 BCE . while the youngest content may date to about 200 CE . </P> <Ol> <Li> Apastamba </Li> <Li> Baudhayana </Li> <Li> Manava </Li> <Li> Katyayana </Li> <Li> Maitrayaniya (somewhat similar to Manava text) </Li> <Li> Varaha (in manuscript) </Li> <Li> Vadhula (in manuscript) </Li> <Li> Hiranyakeshin (similar to Apastamba Shulba Sutras) </Li> </Ol>

Ancient mathematics book shiva sutra was written by