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11: 2.11 Remainder Terms; Stokes Phenomenon
However, on combining (2.11.6) with the connection formula (8.19.18), with m = 1 , we derive … Following §2.4(iv), we rotate the integration path through an angle - θ , which is valid by analytic continuation when - π < θ < π . … For large | z | , with | ph z | 3 2 π - δ ( < 3 2 π ), the Whittaker function of the second kind has the asymptotic expansion (§13.19) …
12: 36.2 Catastrophes and Canonical Integrals
(rotation by ± 2 3 π in x , y plane). …