This paper establishes the concept of maximal common factor and minimal common multiple for compound function and proves their unique existence.

证明了等价关系族构成的有界格，建立了函数复合的最大公因式、最小公倍式等概念，并对其存在唯一性作出证明。

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This paper establishes the concept of maximal common factor and minimal common multiple for compound function and proves their unique existence.

证明了等价关系族构成的有界格，建立了函数复合的最大公因式、最小公倍式等概念，并对其存在唯一性作出证明。

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