• waigl@lemmy.world
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    1 day ago

    Proof by break: Before the break: “We will proof this theorem after a short break”, After the break: “As we have proven before the break…”
    Proof by unavailable literature: The prrof can be found in a publication only available by in-person request in one library of one university in Brno, Czechia. That closed 30 years ago.