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アルゴリズムの計算量についての備忘録

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Last updated at Posted at 2020-06-17

目次

エラトステネスの篩 2020/6/17

エラトステネスの篩

計算量は

\mathcal{O(n\log \log n)}

1~nまでの各整数に対して、その整数の平方根までチェックをするという愚直な方法では

\mathcal{O(n \sqrt{n})}

かかる。

エラトステネスのふるいとその計算量
素数の逆数和が発散することの証明
メルテンスの定理

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