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1: 23.10 Addition Theorems and Other Identities
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►(23.10.8) continues to hold when , , are permuted cyclically.
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►where
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23.10.17
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23.10.18
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►Also, when is replaced by the lattice invariants and are divided by and , respectively.
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2: 23.9 Laurent and Other Power Series
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►Let be the nearest lattice point to the origin, and define
…Explicit coefficients in terms of and are given up to in Abramowitz and Stegun (1964, p. 636).
►For , and with as in §23.3(i),
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►where , if either or , and
…For with and , see Abramowitz and Stegun (1964, p. 637).
3: 23.14 Integrals
4: 23.2 Definitions and Periodic Properties
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►The generators of a given lattice are not unique.
…where are integers, then , are generators of iff
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►When the functions are related by
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►When it is important to display the lattice with the functions they are denoted by , , and , respectively.
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►If , is any pair of generators of , and is defined by (23.2.1), then
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5: 23.12 Asymptotic Approximations
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►If with and fixed, then
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23.12.1
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►provided that in the case of (23.12.1) and (23.12.2).
Also,
…with similar results for and obtainable by use of (23.2.14).
6: 31.2 Differential Equations
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►where and with are generators of the lattice for .
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satisfies (31.2.1) if is a solution of (31.2.1) with transformed parameters ; , , .
…By composing these three steps, there result possible transformations of the dependent variable (including the identity transformation) that preserve the form of (31.2.1).
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►There are homographies that take to some permutation of , where may differ from .
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►There are automorphisms of equation (31.2.1) by compositions of -homotopic and homographic transformations.
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7: 23.11 Integral Representations
8: 23.7 Quarter Periods
9: 23.19 Interrelations
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23.19.1
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23.19.3
►where are the invariants of the lattice with generators and ; see §23.3(i).
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10: 23.3 Differential Equations
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►and are denoted by .
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►Let , or equivalently be nonzero, or be distinct.
Given and there is a unique lattice such that (23.3.1) and (23.3.2) are satisfied.
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►Conversely, , , and the set are determined uniquely by the lattice independently of the choice of generators.
However, given any pair of generators , of , and with defined by (23.2.1), we can identify the individually, via
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