TY  - DATA
AU  - Takloo-Bighash, Ramin
TI  - A pythagorean introduction to number theory: right triangles sums of squares and arithmetic 
T2  - Undergraduate Texts in Mathematics,
SN  - 9783030026042 (E-book)
AV  - QA 241 T34P 2018
PY  - 2018///
CY  - Cham, Switzerland
PB  - Springer
KW  - PYTHAGOREAN THEOREM
KW  - NUMBERS, THEORY
N1  - Includes appendix and index; Introduction -- Basic number theory -- Integral solutions to the Pythagorean Equation -- What integers are areas of right triangles? -- What numbers are the edges of a right triangle? -- Primes of the form 4k+1 -- Gauss sums, Quadratic Reciprocity, and the Jacobi symbol -- Advanced Topics -- Counting Pythagorean triples modulo an integer -- How many lattice points are there on a circle or a sphere? -- What about geometry? --  Another proof of the four squares theorem -- Quadratic forms and sums of squares -- How many Pythagorean triples are there? -- How are rational points distributed, really?
UR  - https://drive.google.com/file/d/1z58GXA33amDJkDb5hMqeQ3rtWUIkXrBI/view?usp=sharing
ER  -