Aryabhata, an Indian mathematician and astronomer, is credited with developing the concept of zero in the 5th century.

Brahmagupta, an Indian mathematician and astronomer, first described the Fibonacci sequence in the 7th century.

The Sulba Sutras contain geometric constructions for the Pythagorean theorem, circles, and spheres.

Bhaskara II developed a formula to calculate the area of a quadrilateral, which is known as Bhaskara's formula.

Srinivasa Ramanujan made significant contributions to number theory, including his work on modular forms and the Riemann zeta function.

'Lilavati' is a mathematical treatise written by Bhaskara II in the 12th century, covering topics such as arithmetic, algebra, and geometry.

Brahmagupta developed the concept of the 'chakravala' method for solving indeterminate equations in the 7th century.

Mahavira wrote the 'Ganita Sara Sangraha', a mathematical text covering topics such as arithmetic, algebra, and geometry, in the 9th century.

Aryabhata developed a method for calculating the value of 'pi' known as Aryabhata's approximation, which gave a value of 3.1416.

Bhaskara II developed the concept of the 'Meru Prastara', a method for calculating the volume of a pyramid, in the 12th century.

Bhaskara II wrote the 'Siddhanta Shiromani', a mathematical and astronomical text covering topics such as arithmetic, algebra, geometry, and trigonometry, in the 12th century.

Brahmagupta developed the concept of the 'Kuttaka' method for solving indeterminate equations in the 7th century.

Aryabhata wrote the 'Aryabhatiya', a mathematical and astronomical text covering topics such as arithmetic, algebra, geometry, and trigonometry, in the 5th century.

Jagadguru Swami Sri Bharati Krishna Tirthaji Maharaja developed the concept of the 'Vedic mathematics' system in the 20th century, based on ancient Indian mathematical principles.

The 'Lilavati' covers topics such as arithmetic, algebra, and geometry.