使得幂GCD阵(Se)整除幂LCM矩阵[Se]的四元gcd封闭集S的一个刻画
사득멱GCD진(Se)정제멱LCM구진[Se]적사원gcd봉폐집S적일개각화
A characterization of the gcd-closed set S with |S|=4such that (Se) divides [Se]
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