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21: 19.2 Definitions
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►The cases with are the complete integrals:
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►The principal values of and are even functions.
►Legendre’s complementary complete elliptic integrals are defined via
…For more details on the analytical continuation of these complete elliptic integrals see Lawden (1989, §§8.12–8.14).
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►The integrals are complete if .
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22: 19.5 Maclaurin and Related Expansions
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19.5.5
, .
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►Coefficients of terms up to are given in Lee (1990), along with tables of fractional errors in and , , obtained by using 12 different truncations of (19.5.6) in (19.5.8) and (19.5.9).
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19.5.8
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19.5.9
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►An infinite series for is equivalent to the infinite product
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23: 21.11 Software
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►A more complete list of available software for computing these functions is found in the Software Index.
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24: 23.7 Quarter Periods
25: 29.18 Mathematical Applications
26: 19.37 Tables
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§19.37(ii) Legendre’s Complete Integrals
►Functions and
►Tabulated for to 6D by Byrd and Friedman (1971), to 15D for and 9D for by Abramowitz and Stegun (1964, Chapter 17), and to 10D by Fettis and Caslin (1964). … ►Functions , , and
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…27: 29.2 Differential Equations
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►This equation has regular singularities at the points , where , and , are the complete elliptic integrals of the first kind with moduli , , respectively; see §19.2(ii).
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29.2.8
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28: 29.8 Integral Equations
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►Let be any solution of (29.2.1) of period , be a linearly independent solution, and denote their Wronskian.
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29.8.2
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29.8.5
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29: 15.17 Mathematical Applications
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§15.17(ii) Conformal Mappings
… ►Hypergeometric functions, especially complete elliptic integrals, also play an important role in quasiconformal mapping. …30: 19.1 Special Notation
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►The first set of main functions treated in this chapter are Legendre’s complete integrals
…The functions (19.1.1) and (19.1.2) are used in Erdélyi et al. (1953b, Chapter 13), except that and are denoted by and , respectively, where .
►In Abramowitz and Stegun (1964, Chapter 17) the functions (19.1.1) and (19.1.2) are denoted, in order, by , , , , , and , where and is the (not related to ) in (19.1.1) and (19.1.2).
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, , and are the symmetric (in , , and ) integrals of the first, second, and third kinds; they are complete if exactly one of , , and is identically 0.
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►The first three functions are incomplete integrals of the first, second, and third kinds, and the function includes complete integrals of all three kinds.