Shridhara, an ancient Indian mathematician, is credited with significant contributions to the field of permutations and combinations.

Shridhara's mathematical work is primarily found in his treatise called 'Ganita Sara Sangraha', which covers various topics including permutations and combinations.

Shridhara's formula for permutations is n! / (n-r)!, where n is the total number of objects and r is the number of objects taken at a time.

Shridhara's formula for combinations is n! / (r! * (n-r)!) where n is the total number of objects and r is the number of objects taken at a time.

Shridhara's work on permutations and combinations was significant because it laid the foundation for modern combinatorics, provided systematic methods for solving problems, and had practical applications in fields like astronomy and architecture.

Shridhara used the term 'Vikalpa' to refer to permutations, which means 'different arrangements' in Sanskrit.

Shridhara used the term 'Yoga' to refer to combinations, which means 'union' or 'joining' in Sanskrit.

The chapter in 'Ganita Sara Sangraha' that specifically addresses permutations and combinations is called 'Vikalpa Adhyaya'.

Shridhara's approach to solving problems in permutations and combinations involved a combination of algebraic methods, geometric constructions, and numerical techniques.

Shridhara's work on permutations and combinations had a profound impact on later mathematicians, inspiring new techniques, leading to the formulation of theorems, and contributing to the progress of various scientific fields.

Shridhara is believed to have lived in the 10th century CE.

Shridhara's mathematical work covered a wide range of topics, including arithmetic, geometry, algebra, and astronomy.

Shridhara's work in permutations and combinations, along with his contributions to other mathematical areas, marked a significant advancement in Indian mathematics, influenced mathematical development globally, and laid the groundwork for future discoveries.

Shridhara's work in permutations and combinations provided a systematic framework for studying combinations, introduced new techniques for solving combinatorial problems, and laid the foundation for the development of modern combinatorics.

Shridhara's work on permutations and combinations has practical applications in various fields, including counting arrangements in games and puzzles, designing experimental trials, and solving problems in probability.