What Are Sheaves? – Quanta Magazine https://www.quantamagazine.org Illuminating science Mon, 16 Sep 2024 14:10:47 -0400 en-US hourly 1 https://wordpress.org/?v=6.2 What Are Sheaves? https://www.quantamagazine.org/what-are-sheaves-20240719/ https://www.quantamagazine.org/what-are-sheaves-20240719/#respond Fri, 19 Jul 2024 14:00:55 +0000 https://www.quantamagazine.org/?p=139212 The post What Are Sheaves? first appeared on Quanta Magazine

]]> In 1940, the French mathematician and artillery officer Jean Leray was taken prisoner by the Germans. He told his captors that he was a topologist, fearful that if they discovered his true area of expertise, hydrodynamics, they would force him to aid the German war effort. For the nearly five years of his imprisonment, Leray kept up this subterfuge by carrying out research in topology...

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