Mutual-subtraction algorithm and its applications in ancient China / Shen Kangsheng.
Abstract:
The mutual-subtraction algorithm was used to find the greatest common factor and least common multiple of integers, to calculate the common period of fractional periods, and to obtain best approximations of decimals as well as to solve congruences and indeterminate equations of first degree
Historia mathematica Vol. 15 (1988), p. 135-147