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A 24×60 rectangular area can be divided into a grid of 12×12 squares, with two squares along one edge (24/12 = 2) and five squares along the other (60/12 = 5). The greatest common divisor of two numbers a and b is the product of the prime factors shared by the two numbers, where each prime factor can be repeated as many times as it divides ...
Appearance. In mathematics, the greatest common divisor (GCD), also known as greatest common factor (GCF), of two or more integers, which are not all zero, is the largest positive integer that divides each of the integers. For two integers x, y, the greatest common divisor of x and y is denoted . For example, the GCD of 8 and 12 is 4, that is ...
The sequence of highly composite numbers (sequence A002182in the OEIS) is a subset of the sequence of smallest numbers kwith exactly ndivisors (sequence A005179in the OEIS). Highly composite numbers whose number of divisors is also a highly composite number are. 1, 2, 6, 12, 60, 360, 1260, 2520, 5040, 55440, 277200, 720720, 3603600, 61261200 ...
If, on the other hand, z 0 is an inert prime (that is, N(z 0) = p 2 is the square of a prime number, which is congruent to 3 modulo 4), then the residue class field has p 2 elements, and it is an extension of degree 2 (unique, up to an isomorphism) of the prime field with p elements (the integers modulo p).
hide. In algebra, the greatest common divisor (frequently abbreviated as GCD) of two polynomials is a polynomial, of the highest possible degree, that is a factor of both the two original polynomials. This concept is analogous to the greatest common divisor of two integers. In the important case of univariate polynomials over a field the ...
1. The product of two numbers, each of which is a sum of two squares, is itself a sum of two squares. This is a well-known property, based on the identity. due to Diophantus. 2. If a number which is a sum of two squares is divisible by a prime which is a sum of two squares, then the quotient is a sum of two squares.
Fermat's factorization method, named after Pierre de Fermat, is based on the representation of an odd integer as the difference of two squares: That difference is algebraically factorable as ; if neither factor equals one, it is a proper factorization of N. Each odd number has such a representation. Indeed, if is a factorization of N, then.
A modular form of weight k for the modular group. is a complex-valued function f on the upper half-plane H = {z ∈ C, Im (z) > 0}, satisfying the following three conditions: f is a holomorphic function on H. For any z ∈ H and any matrix in SL (2, Z) as above, we have: f is required to be bounded as z → i∞. Remarks: