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单词 gcd
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gcd
gcd n. (also GCD) [originally after French p. g. c. d. < the initial letters of plus grand commun diviseur (both 1828 in the source translated in quot. 1831)] Mathematics greatest common divisor, the largest whole number that divides two or more given numbers without remainder; (in later use also) a divisor of two or more elements of a commutative ring whose own divisors include all the other common divisors of those elements.
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1831 E. C. Ross tr. L. P. M. Bourdon Elements Algebra vi. 279 We begin with finding the g. c. d. [Fr. le p. g. c. d.] of the two polynomials of the lowest degree.
1910 Encycl. Brit. II. 531/2 If we resolve two numbers into their prime factors, we can find their Greatest Common Divisor or Highest Common Factor (written G.C.D. or G.C.F. or H.C.F.), i.e. the greatest number which is a factor of both.
2008 J.-L. Chabert in T. Gowers Princeton Compan. Math. ii. 109/1 There is a clear difference between this algorithm for approximating π and Euclid's algorithm for calculating the gcd of two positive integers.
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