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computer algebra and symbolic computing,
in particular algorithms for symbolic summation,
algorithmic treatment of recurrences and identities,
algorithmics of formal power series
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computer generation and enumeration of combinatorial objects
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combinatorics, in particular enumerative combinatorics
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combinatorial aspects of special functions
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combinatorics of ordered structures
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algorithmic combinatorics and its applications of combinatorics
to algorithmic problems, in particular: analysis of algorithms