John Wallis

John Wallis was a 17th-century English mathematician known for his contributions to algebra and calculus. He introduced the concept of infinity in mathematics and is credited with the notation for the integral sign (∫) used in calculus. Wallis worked on the development of formal algebra, helping to establish symbols and conventions that made mathematical expression clearer. His work laid the groundwork for modern mathematics, influencing calculus, probability, and mathematical notation, making complex ideas more accessible for future generations of mathematicians.