An introduction to the theory of numbers. 4th ed. (English) Zbl 0431.10001
New York etc.: John Wiley & Sons. XIII, 335 p. £10.00 (1980).
MSC:
| 11-01 | Introductory exposition (textbooks, tutorial papers, etc.) pertaining to number theory |
| 11Axx | Elementary number theory |
| 11Dxx | Diophantine equations |
| 11B83 | Special sequences and polynomials |
| 11R04 | Algebraic numbers; rings of algebraic integers |
Keywords:
introductionOnline Encyclopedia of Integer Sequences:
Number of ways of writing n as a sum of at most two nonzero squares, where order matters; also (number of divisors of n of form 4m+1) - (number of divisors of form 4m+3).All positive numbers that are not the sum of 5 nonzero squares.
Period 4: repeat [1,0,-1,0]; expansion of 1/(1 + x^2).
Numbers of the form 2^k * m, with k > 1 and m an odd composite number.
Number of units in the imaginary quadratic field Q(sqrt(-d)), where d > 0 is the n-th squarefree number.
