Madhava of Sangamagrama, who lived in the 14th century, is often referred to as the 'Father of Indian Calculus' due to his substantial contributions to the development of calculus.

Madhava of Sangamagrama established the 'Kerala School of Astronomy and Mathematics', which became a significant center for mathematical research and advancements.

Madhava of Sangamagrama developed the 'Madhava Series', which is a series expansion method for approximating various mathematical functions.

Aryabhata, a renowned Indian mathematician and astronomer, is credited with discovering the concept of the 'sine function'.

Bhaskara II's treatise 'Siddhanta Shiromani' includes substantial contributions to calculus, particularly in the area of differential calculus.

Madhava of Sangamagrama made significant contributions to the development of 'infinite series' and 'power series', which are fundamental concepts in calculus.

Srinivasa Ramanujan developed the 'Ramanujan's Summation Formula', which provides a method for evaluating certain infinite series.

Srinivasa Ramanujan made significant contributions to the study of the 'zeta function' and modular forms, which are important areas of mathematics.

Srinivasa Ramanujan developed the 'Ramanujan's Prime Number Theorem', which provides an asymptotic formula for the distribution of prime numbers.

Srinivasa Ramanujan formulated the 'Ramanujan conjecture', which is a famous unsolved problem in mathematics related to the partition function.

Srinivasa Ramanujan developed the 'Ramanujan's Modular Equation', which is a fundamental result in the theory of modular forms.

Srinivasa Ramanujan collaborated with G.H. Hardy to develop the 'Hardy-Ramanujan theorem', which is a significant result in number theory.

Srinivasa Ramanujan formulated the 'Ramanujan's Riemann Hypothesis', which is a famous unsolved problem in mathematics related to the Riemann zeta function.

Srinivasa Ramanujan developed the 'Ramanujan tau function', which is a multiplicative function that plays a significant role in number theory.

Srinivasa Ramanujan developed the 'Ramanujan's Modular Equation', which is a fundamental result in the theory of modular forms.