最終更新日：2025/11/26
To compare the sizes of infinite sets, set theorists often examine the Hartogs number of a given set, which is the cardinality of the least ordinal that cannot be injected into that set.
正解を見る
To compare the sizes of infinite sets, set theorists often examine the Hartogs number of a given set, which is the cardinality of the least ordinal that cannot be injected into that set.
音声機能が動作しない場合はこちらをご確認ください
編集履歴（0）
