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11: 26.17 The Twelvefold Way
§26.17 The Twelvefold Way
…12: 20.11 Generalizations and Analogs
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§20.11(v) Permutation Symmetry
… ►The importance of these combined theta functions is that sets of twelve equations for the theta functions often can be replaced by corresponding sets of three equations of the combined theta functions, plus permutation symmetry. …13: 26.4 Lattice Paths: Multinomial Coefficients and Set Partitions
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is the number of permutations of with cycles of length 1, cycles of length 2, , and cycles of length :
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26.4.7
►(The empty set is considered to have one permutation consisting of no cycles.)
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14: 34.7 Basic Properties: Symbol
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►The symbol has symmetry properties with respect to permutation of columns, permutation of rows, and transposition of rows and columns; these relate 72 independent symbols.
Even (cyclic) permutations of either columns or rows, as well as transpositions, leave the symbol unchanged.
Odd permutations of columns or rows introduce a phase factor , where is the sum of all arguments of the symbol.
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15: 19.21 Connection Formulas
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►Let , , and be positive and distinct, and permute
and to ensure that does not lie between and .
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►Because is completely symmetric, can be permuted on the right-hand side of (19.21.10) so that if the variables are real, thereby avoiding cancellations when is calculated from and (see §19.36(i)).
…where both summations extend over the three cyclic permutations of .
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►and may be permuted.
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►For each value of , permutation of produces three values of , one of which lies in the same region as and two lie in the other region of the same type.
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16: 1.7 Inequalities
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►Also and are constants that are not simultaneously zero.
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17: DLMF Project News
error generating summary18: 19.23 Integral Representations
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►With denoting any permutation of , , ,
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