Aryabhata is widely regarded as the father of Indian mathematics due to his significant contributions to the field in the 5th century CE.

Brahmagupta is credited with developing the concept of zero and introducing it into the Indian number system in the 7th century CE.

Aryabhata's mathematical treatise is called Aryabhatiya, which covers topics such as arithmetic, algebra, geometry, and astronomy.

Bhaskara II is credited with developing the Fibonacci sequence, also known as the golden ratio, in the 12th century CE.

The Pythagorean Theorem, also known as Pythagoras's Theorem, is a fundamental theorem in geometry that relates the lengths of the sides of a right triangle.

Aryabhata is credited with developing the concept of the sine function in the 5th century CE.

Brahmagupta's mathematical treatise is called Brahmasphuta Siddhanta, which covers topics such as arithmetic, algebra, geometry, and astronomy.

Aryabhata is credited with developing the concept of the decimal system in the 5th century CE.

Bhaskara II's mathematical treatise is called Siddhanta Shiromani, which covers topics such as arithmetic, algebra, geometry, and astronomy.

Brahmagupta is credited with developing the concept of the negative number in the 7th century CE.

Srinivasa Ramanujan did not write any mathematical treatises. He was known for his groundbreaking work in number theory and his contributions to various mathematical journals.

Bhaskara II is credited with developing the concept of the continued fraction in the 12th century CE.

Lilavati is a mathematical treatise written by Bhaskara II in the 12th century CE, which covers topics such as arithmetic, algebra, geometry, and astronomy.

Bhaskara II is credited with developing the concept of the golden ratio in the 12th century CE.

Madhava of Sangamagrama did not write any mathematical treatises. He was known for his work on infinite series and his contributions to calculus.