Ramanujan's Lost Notebook

Ramanujan's Lost Notebook is a collection of complex mathematical results that Indian mathematician Srinivasa Ramanujan had sketched in 1940, shortly before his death, but it was not widely known until its discovery in 2015. It contains deep insights into areas like modular forms, q-series, and partitions—topics important in pure mathematics and theoretical physics. The notebook's contents have since inspired new research, expanding our understanding of mathematical patterns and structures. It is considered a significant find because it reveals Ramanujan's groundbreaking ideas that had been previously unpublished, showcasing his extraordinary talent and influence on modern mathematics.