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11: 26.14 Permutations: Order Notation
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►As an example, is an element of The inversion number is the number of pairs of elements for which the larger element precedes the smaller:
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►The Eulerian number, denoted , is the number of permutations in with exactly descents.
…The Eulerian number
is equal to the number of permutations in with exactly excedances.
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§26.14(iii) Identities
…12: 26.7 Set Partitions: Bell Numbers
§26.7 Set Partitions: Bell Numbers
►§26.7(i) Definitions
… ►§26.7(ii) Generating Function
… ►§26.7(iii) Recurrence Relation
… ►§26.7(iv) Asymptotic Approximation
…13: 24.14 Sums
§24.14 Sums
►§24.14(i) Quadratic Recurrence Relations
… ►§24.14(ii) Higher-Order Recurrence Relations
►In the following two identities, valid for , the sums are taken over all nonnegative integers with . … ►For other sums involving Bernoulli and Euler numbers and polynomials see Hansen (1975, pp. 331–347) and Prudnikov et al. (1990, pp. 383–386).14: 24.10 Arithmetic Properties
§24.10 Arithmetic Properties
… ►Here and elsewhere two rational numbers are congruent if the modulus divides the numerator of their difference. ►§24.10(ii) Kummer Congruences
… ►§24.10(iii) Voronoi’s Congruence
… ►§24.10(iv) Factors
…15: 26.8 Set Partitions: Stirling Numbers
§26.8 Set Partitions: Stirling Numbers
►§26.8(i) Definitions
… ► … ►§26.8(v) Identities
… ►§26.8(vi) Relations to Bernoulli Numbers
…16: 24.19 Methods of Computation
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§24.19(i) Bernoulli and Euler Numbers and Polynomials
►Equations (24.5.3) and (24.5.4) enable and to be computed by recurrence. …A similar method can be used for the Euler numbers based on (4.19.5). … ►§24.19(ii) Values of Modulo
… ►We list here three methods, arranged in increasing order of efficiency. …17: 24.2 Definitions and Generating Functions
§24.2 Definitions and Generating Functions
►§24.2(i) Bernoulli Numbers and Polynomials
… ►§24.2(ii) Euler Numbers and Polynomials
… ► … ► …18: 24.20 Tables
§24.20 Tables
►Abramowitz and Stegun (1964, Chapter 23) includes exact values of , , ; , , , , 20D; , , 18D. ►Wagstaff (1978) gives complete prime factorizations of and for and , respectively. In Wagstaff (2002) these results are extended to and , respectively, with further complete and partial factorizations listed up to and , respectively. …19: 24.5 Recurrence Relations
§24.5 Recurrence Relations
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24.5.4
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24.5.5
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