J A Campbell 1979 J. Phys. A: Math. Gen. 12 1149 doi:10.1088/0305-4470/12/8/008
J A Campbell
Show affiliationsTwo classes of functions obtainable from the special function Y2n for the phase-integral approximation are computed symbolically. The first class is that of functions Z2n and U2n, where Y2n=Z2n+DU2n, and D is a differential operator. It has the advantage of simplifying the evaluation of integrals involving Y2n. The second class, of functions A2nand B2n-2 which are derived from Z2n, is associated with an important integral identity in the phase-integral approximation.
34Lxx Ordinary differential operators (See also 47E05)
65D20 Computation of special functions, construction of tables (See also 33F05)
Issue 8 (August 1979)
J A Campbell 1979 J. Phys. A: Math. Gen. 12 1149
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