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  1. B̅ (cmplstofb@mathtod.online)'s status on Wednesday, 17-Feb-2021 17:05:21 JST B̅ B̅

    あれ,置換後の\1ではなくて純粋に正規表現としての\1もありませんでしたっけ?というかあると思います。

    「\(a\)*\1」という正規表現があるので。https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03_06

    In conversation Wednesday, 17-Feb-2021 17:05:21 JST from mathtod.online permalink

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