The same century also saw the merging of two streams of mathematics which had been split since the sixth century BC: the philosophical-speculative mathematics of Pythagoras and his successors, and the commercial arithmetic used by merchants. The mix would prove epoch-changing. It spurred the gradual rise of mathematics to its eventual usurpation of Latin as the lingua franca of Europe and ushered in a new era: the Age of Science.

— Double entry by Jane Gleeson-White (6%)