最简分数 (正體)
若一分数可表为,且(整数),(p,q) = 1,则称为最简分数或既约分数。假若p和q还有别的因子,则其非最简分数,即假若(p,q) = d,且设则 其中为的最简分数。
像、或等都是最简分数,而不是,因为(6,4) = 2,因而
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