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200 1 $aPerturbation techniques in mathematics, Physics, and Engineering$fR. Bellman.
210   $aNew York$cDoubleday$d1972.
215   $aviii, 118 p.$d22 cm
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200 10$aAsymptotic forms of Whittaker's confluent hypergeometric functions /$fA. Erde?lyi, C.A. Swanson
210  1$aProvidence, R.I. :$cAmerican Mathematical Society,$d1957.
215   $a1 online resource (60 pages)
225 1 $aMemoirs of the American Mathematical Society ;$vnumber 25
300   $aCover title.
311 0 $a0-8218-1225-4 
320   $aBibliography: pages 49-50.
327   $a""Table of Contents""; ""1. Introduction""; ""2. Confluent hypergeometric functions""; ""3. Bessel functions""; ""4. Airy functions""; ""5. The Bessel comparison functions""; ""6. The functions U and T""; ""7. Asymptotic forms for the functions u[sub(r)] and u[sub(r)]'""; ""8. The Airy comparison functions""; ""9. Asymptotic forms for the functions v[sub(r)] and v[sub(r)]'""; ""10. Asymptotic forms for Whittaker functions""; ""11. Asymptotic forms for Coulomb wave functions""; ""12. Simplified asymptotic forms for restricted x-intervals""; ""References""
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517 3 $aWhittaker's confluent hypergeometric functions
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606   $aCoulomb functions
606   $aHypergeometric functions
615  0$aAiry functions.
615  0$aCoulomb functions.
615  0$aHypergeometric functions.
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