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1: 22.7 Landen Transformations
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§22.7(i) Descending Landen Transformation
…2: 22.17 Moduli Outside the Interval [0,1]
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§22.17(ii) Complex Moduli
…3: 26.12 Plane Partitions
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26.12.18
►A descending plane partition is a strict shifted plane partition in which the number of parts in each row is strictly less than the largest part in that row and is greater than or equal to the largest part in the next row.
The example of a strict shifted plane partition also satisfies the conditions of a descending plane partition.
The number of descending plane partitions in is
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26.12.24
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4: 19.36 Methods of Computation
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►The step from to is an ascending Landen transformation if (leading ultimately to a hyperbolic case of ) or a descending Gauss transformation if (leading to a circular case of ).
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►Thompson (1997, pp. 499, 504) uses descending Landen transformations for both and .
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►Descending Gauss transformations of (see (19.8.20)) are used in Fettis (1965) to compute a large table (see §19.37(iii)).
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►The function is computed by descending Landen transformations if is real, or by descending Gauss transformations if is complex (Bulirsch (1965b)).
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5: 19.8 Quadratic Transformations
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Descending Landen Transformation
… ►We consider only the descending Gauss transformation because its (ascending) inverse moves closer to the singularity at . …6: 19.22 Quadratic Transformations
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►If are real and positive, then (19.22.18)–(19.22.21) are ascending Landen transformations when (implying ), and descending Gauss transformations when (implying ).
…Descending Gauss transformations include, as special cases, transformations of complete integrals into complete integrals; ascending Landen transformations do not.
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►The transformations inverse to the ones just described are the descending Landen transformations and the ascending Gauss transformations.
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7: 22.20 Methods of Computation
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§22.20(iii) Landen Transformations
…8: 12.11 Zeros
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►For example, let the th real zeros of and , counted in descending order away from the point , be denoted by and , respectively.
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9: 30.9 Asymptotic Approximations and Expansions
10: 18.26 Wilson Class: Continued
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►Moreover, if one or more of the new parameters becomes zero, then the polynomial descends to a lower family in the Askey scheme.