Takloo-Bighash, Ramin A Pythagorean introduction to number theory: right triangles, sums of squares, and arithmetic / - Switzerland: Springer, c2018. - xviii, 279p. - Undergraduate texts in Mathematics . Purchased under NBHM grant for the year 2023-2024 Includes bibliography and index. ISBN: 9783030026035 Dewey Class. No.: 512.7 / T136.PI