Reviews

"[ Summing It Up ] offers a clear and beautiful progression from addition to modern number theory." --Antonio Cangiano, Math-Blog, " Summing It Up ambitiously presents concepts of number theory, from the elementary to the advanced, for readers with only a knowledge of high school math and some calculus. With a crisp yet conversational style and excellent examples, Ash and Gross explain a great amount of interesting and important math." --James Pommersheim, coauthor of Number Theory: A Lively Introduction with Proofs, Applications, and Stories, " Summing It Up uses addition as a springboard to present a fascinating and accessible look at numbers and number theory, and how we apply beautiful numerical properties to answer math problems. . . . Ash and Gross tailor their succinct and engaging investigations for math enthusiasts of all backgrounds." -- L'Enseignement Mathematique, "With joy and reflection, Summing It Up encourages readers to work alongside the authors to engage in simple computations with profound implications. It progresses elegantly to an insightful discussion of the ideas behind the classical theory of modular forms. A wonderful book." --Barry Mazur, Harvard University, Readers of the books [ Fearless Symmetry and Elliptic Tales ] will not need this review to be talked into buying 'Summing it Up by the same authors, Avner Ash and Robert Gross. . . . Like the other volumes it takes the readers on a guided tour through parts of modern number theory by starting with very elementary notions. ---Franz Lemmermeyer, Zentralblatt MATH, "Readers of the books [ Fearless Symmetry and Elliptic Tales ] will not need this review to be talked into buying 'Summing it Up by the same authors, Avner Ash and Robert Gross. . . . Like the other volumes it takes the readers on a guided tour through parts of modern number theory by starting with very elementary notions. " --Franz Lemmermeyer, Zentralblatt MATH, Engaging and conversational, without losing accuracy or essential rigor. ---Dominic Lanphier, The American Mathematical Monthly, "Ash and Gross do a masterful job of leading students from finite sums to modular forms and to the forefront of modern number theory. . . . This is an excellent piece of mathematical writing." -- Choice, Summing It Up uses addition as a springboard to present a fascinating and accessible look at numbers and number theory, and how we apply beautiful numerical properties to answer math problems. . . . Ash and Gross tailor their succinct and engaging investigations for math enthusiasts of all backgrounds., "The authors did a remarkable job in making some aspects of modern number theory very accessible to readers with only a minimal knowledge of mathematics, say a student who had a first calculus course. However, also mathematicians who do not have number theory as their main focus will enjoy this book." --Adhemar Bultheel, European Mathematical Society, "This book takes general readers on a journey from simple addition to the modern theory of modular forms. Plentiful and accurate references are available for interested readers who want to look up further information." --Xiaoheng Wang, Princeton University, "In Summing It Up , Ash and Gross, with their customary charm and clarity, build an impressive tower from the most basic mathematical story imaginable. They start by adding up finite sequences and whole numbers before journeying to the upper reaches of contemporary developments in number theory." --Jordan Ellenberg, author of How Not to Be Wrong: The Power of Mathematical Thinking, With their customary charm and characteristic panache, the authors manage mostly to be clear and precise without being pedantic. . . . There is no doubt that a conscientious [reader] will gain real understanding of the many topics being discussed. ---Peter Shiu, Mathematical Gazette, "[A]n accessible and fun introduction to modular forms. . . . [ Summing It Up ] is engaging and conversational, without losing accuracy or essential rigor." --Dominic Lanphier, American Mathematical Monthly, Ash and Gross do a masterful job of leading students from finite sums to modular forms and to the forefront of modern number theory. . . . This is an excellent piece of mathematical writing., "A well-motivated and fun introduction to some very deep topics in mathematics, Summing It Up takes readers on a mathematics tour starting with very classical material and building towards some amazing recent work, with many highlights along the way. It can be read by those with many different levels of mathematical background. I thoroughly enjoyed it." --Nathan Kaplan, University of California, Irvine, [A]n accessible and fun introduction to modular forms. . . . [ Summing It Up ] is engaging and conversational, without losing accuracy or essential rigor. ---Dominic Lanphier, American Mathematical Monthly, The authors did a remarkable job in making some aspects of modern number theory very accessible to readers with only a minimal knowledge of mathematics, say a student who had a first calculus course. However, also mathematicians who do not have number theory as their main focus will enjoy this book. ---Adhemar Bultheel, European Mathematical Society, "In Summing It Up , Ash and Gross are erudite and meticulous--they write with care and precision. Their book adopts the voice of a wise elder telling math stories to precocious children. It will interest readers of all ages who seek a window into current mathematics." --Kenneth Ribet, University of California, Berkeley