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I've come across a set of slides by Guram Bezhanishvili where he claims the category of compact hausdorff spaces is related by duality to de Vries algebras. What are they?

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Google finds… which contains a definition. – Qiaochu Yuan Jul 12 '12 at 0:10

See his article "Stone duality and Gleason covers through de Vries duality" in Topology and its Applications 157:1064--1080, 2010, Definition 3.2.

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