Review Note

Last Update: 01/28/2025 10:39 AM

Current Deck: Mathématiques::Classiques::Thomas Lefevre::à partager::Topologie

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Texte
Montrer que \(\varphi : M \mapsto \pi_M\) n'est pas continue sur \(M_n(\mathbb C)\).
  • {{c1::On a \(\varphi\left(\frac 1 p \mathrm C_{X^n} \right) = X^n\) pour tout \(p \in \mathbb N\backslash \{0\}\), et \(\varphi\left(0_{\mathrm M_n(\mathbb C)}\right) = X\), donc \(\varphi\) n'est pas continue.}}
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Lefevre_Thomas topologie

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