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reversion of series

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1: 2.2 Transcendental Equations
where F 0 = f 0 and s F s ( s 1 ) is the coefficient of x 1 in the asymptotic expansion of ( f ( x ) ) s (Lagrange’s formula for the reversion of series). …
2: 2.1 Definitions and Elementary Properties
it being understood that these equalities are not reversible. … Let a s x s be a formal power series (convergent or divergent) and for each positive integer n , … Most operations on asymptotic expansions can be carried out in exactly the same manner as for convergent power series. …For reversion see §2.2. … In those cases it is usually necessary to interpret each infinite series separately in the manner described above; that is, it is not always possible to reinterpret the asymptotic approximation as a single asymptotic expansion. …
3: 3.7 Ordinary Differential Equations
§3.7(ii) Taylor-Series Method: Initial-Value Problems
Similarly, if w ( z ) is decaying at least as fast as all other solutions along 𝒫 , then we may reverse the labeling of the z j along 𝒫 and begin with initial values w ( b ) and w ( b ) .
§3.7(iii) Taylor-Series Method: Boundary-Value Problems
It will be observed that the present formulation of the Taylor-series method permits considerable parallelism in the computation, both for initial-value and boundary-value problems. … General methods for boundary-value problems for ordinary differential equations are given in Ascher et al. (1995). …
4: 27.13 Functions
In fact, there are four representations, given by 5 = 2 2 + 1 2 = 2 2 + ( 1 ) 2 = ( 2 ) 2 + 1 2 = ( 2 ) 2 + ( 1 ) 2 , and four more with the order of summands reversed. … Mordell (1917) notes that r k ( n ) is the coefficient of x n in the power-series expansion of the k th power of the series for ϑ ( x ) . …
5: 1.7 Inequalities
Minkowski’s Inequality
The direction of the inequality is reversed, that is, , when 0 < p < 1 . …
Minkowski’s Inequality
The direction of the inequality is reversed, that is, , when 0 < p < 1 . …
6: Bibliography F
  • B. R. Fabijonas and F. W. J. Olver (1999) On the reversion of an asymptotic expansion and the zeros of the Airy functions. SIAM Rev. 41 (4), pp. 762–773.
  • N. J. Fine (1988) Basic Hypergeometric Series and Applications. Mathematical Surveys and Monographs, Vol. 27, American Mathematical Society, Providence, RI.
  • W. B. Ford (1960) Studies on Divergent Series and Summability & The Asymptotic Developments of Functions Defined by Maclaurin Series. Chelsea Publishing Co., New York.
  • C. L. Frenzen and R. Wong (1986) Asymptotic expansions of the Lebesgue constants for Jacobi series. Pacific J. Math. 122 (2), pp. 391–415.
  • T. Fukushima (2012) Series expansions of symmetric elliptic integrals. Math. Comp. 81 (278), pp. 957–990.