A Course of Modern Analysis (colloquially known as Whittaker and Watson) is a landmark textbook on mathematical analysis written by E. T. Whittaker and G. N. Watson, first published by Cambridge University Press in 1902. (The first edition was Whittaker's alone; it was in later editions with Watson that this book is best known.) The book was one of the earliest to use decimal numbering for its sections, an innovation the authors attribute to Giuseppe Peano.