Around Fontaine’s Period Rings
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‘I live my life in widening rings…’
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Hensel’s Proof of the Transcendence of e
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In 1905, Hensel provided the following proof about the transcendence of \(e\).
From Poincaré’s Lemma to Volterra’s Theorem
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‘A Forgotten Turning‑Point in the History of Differential Forms from this paper of Hans Samelson ‘