A History in Sum: 150 Years of Mathematics at Harvard (1825-1975)In the twentieth century, American mathematicians began to make critical advances in a field previously dominated by Europeans. Harvard's mathematics department was at the center of these developments. A History in Sum is an inviting account of the pioneers who trailblazed a distinctly American tradition of mathematics in algebraic geometry and topology, complex analysis, number theory, and a host of esoteric subdisciplines that have rarely been