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    まげ店長 (magemanager@mathtod.online)'s status on Saturday, 04-Feb-2023 23:55:19 JST まげ店長 まげ店長
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    @mathmathniconico
    #類体論へ至る道
    定理12.4
    $M$を体$K$の拡大体とし、$δ$を$M/K$の共役写像とすると$δ$は$K$の代数的閉包$\overline{K}$の$K$自己同型写像に延長できる。
    (証明)
    $K-M_1-F_1-…-F_{max}-L_1$
     |   $↓$            $↓$
     |  $φ$            $ψ$
     |  $↓$            $↓$
    $K-M_2————————L_2$

    In conversation Saturday, 04-Feb-2023 23:55:19 JST from mathtod.online permalink

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