Recently S. D. Cohen resolved a conjecture of Chowla and Zassenhaus (1968) in the affirmative by showing that, if f(x) and g(x) are integral polynomials of degree n ≥ 2 and p is a prime exceeding (n2 ...
We show that permutation schedules are always optimal for regular, symmetric measures of performance for the m-machine flow shop with precedence constraints provided that processing times are ...
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