| Citation | Professor Richard Thomas, Professor of Pure Mathematics, Department of Mathematics, Imperial College London
Richard Thomas is distinguished for his work in algebraic geometry, and connections with mathematical physics. In his early work he developed an enumerative theory for sheaves over Calabi-Yau threefolds, which has grown into a huge topic, having deep connections with string theory. Thomas has continued to be a world leader in this development. A theme running through much of Thomas' work is the use of derived categories. In a seminal paper, he and Seidel constructed "twists" on derived categories which are fundamental in mirror symmetry. He has also made important contributions to Geometric Invariant Theory and the Hodge conjecture.
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