Aryabhata is considered the father of Indian mathematics due to his significant contributions to various fields of mathematics, including arithmetic, algebra, geometry, and astronomy.

Brahmagupta is credited with developing the concept of zero and its use in mathematical operations.

Pingala, an ancient Indian mathematician, is known for his work on the Fibonacci sequence and the Pascal's triangle, which he described in his book 'Chandaḥśāstra'.

Madhava of Sangamagrama is known for his contributions to trigonometry, including the development of infinite series expansions for trigonometric functions.

Srinivasa Ramanujan is considered one of the greatest mathematicians of all time and is known for his remarkable contributions to number theory, including his work on modular forms and the Ramanujan prime.

Ganesha Harishchandra is known for his work on calculus, particularly his contributions to the theory of differential equations.

Harish-Chandra is known for his work on the theory of equations, particularly his contributions to the representation theory of semisimple Lie groups.

C. P. Ramanujam is known for his work on algebraic geometry, particularly his contributions to the theory of moduli spaces.

K. S. Chandrasekharan is known for his work on number theory and Diophantine equations, particularly his contributions to the theory of modular forms and automorphic functions.

S. Ramanan is known for his work on topology, particularly his contributions to the theory of moduli spaces and algebraic geometry.

Shing-Tung Yau is known for his work on differential geometry, particularly his contributions to the Calabi-Yau manifolds and the mirror symmetry.

Manjul Bhargava is known for his work on algebraic number theory, particularly his contributions to the theory of elliptic curves and modular forms.

R. Parthasarathy is known for his work on representation theory, particularly his contributions to the theory of quantum groups and Lie algebras.

V. S. Varadarajan is known for his work on probability theory, particularly his contributions to the theory of stochastic processes and diffusion processes.

S. R. Srinivasa Varadhan is known for his work on analysis, particularly his contributions to the theory of large deviations and diffusion processes.