Mathematical Sciences Classification System
11Bxx - Sequences and sets
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                            11B05Density, gaps, topology
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                            11B13Additive bases, including sumsets [See also 05B10]
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                            11B25Arithmetic progressions [See also 11N13]
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                            11B30Arithmetic combinatorics; higher degree uniformity
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                            11B34Representation functions
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                            11B37Recurrences {For applications to special functions, see 33-XX}
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                            11B39Fibonacci and Lucas numbers and polynomials and generalizations
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                            11B50Sequences (mod $m$)
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                            11B57Farey sequences; the sequences ${1^k, 2^k, \cdots}$
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                            11B65
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                            11B68Bernoulli and Euler numbers and polynomials
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                            11B73Bell and Stirling numbers
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                            11B75Other combinatorial number theory
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                            11B83Special sequences and polynomials
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                            11B85Automata sequences
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                            11B99None of the above, but in this section