The document discusses the origins of calculus and whether it was invented by Newton, Leibniz, or Indian mathematicians. It provides background on Newton, Leibniz, and notes that Indian mathematicians were using concepts of calculus as early as the 10th century. It discusses several Indian mathematicians who made contributions involving concepts now seen as integral to calculus, such as derivatives, integrals, power series, and infinitesimals. These contributions began as early as the 10th century and continued through the Kerala school of the 14th-16th centuries, predating Newton and Leibniz by several centuries.