| 31. | It is exactly this that makes combinatorics very much alive.
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| 32. | He has written four books in computer science and combinatorics.
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| 33. | Geometric combinatorics is related to associahedra and Birkhoff polytopes.
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| 34. | One important technique in arithmetic combinatorics is the ergodic theory of dynamical systems.
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| 35. | Today, the theory rests on advanced topics in linear algebra, combinatorics.
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| 36. | The calculus of finite differences is related to the umbral calculus of combinatorics.
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| 37. | Faudree specialized in combinatorics, and specifically in graph theory and Ramsey theory.
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| 38. | Another set-denotational convention that relies on metaphor comes from enumerative combinatorics.
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| 39. | In mathematics, his work has concentrated on combinatorics.
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| 40. | He is co-editor in chief of the European Journal of Combinatorics.
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