Hilary Ann Priestley is a British mathematician.
She is a professor at the University of Oxford and a Fellow of St Anne's College, Oxford, where she has been Tutor in Mathematics since 1972.
[2] Hilary Priestley introduced ordered separable topological spaces; such topological spaces are now usually called Priestley spaces in her honour.
[3] The term "Priestley duality" is also used for her application of these spaces in the representation theory of distributive lattices.
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