Watson's Lemma - Asymptotic Evaluation Integrals

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SUMMARY

The discussion focuses on the asymptotic evaluation of integrals using Watson's Lemma, specifically aiming to demonstrate that the integral is approximately equal to (1/3)!/x^(1/3). Participants suggest exploring further substitutions and changing the limits of integration. The conversation highlights the importance of integration by parts as a common technique for solving such problems, with different approaches depending on whether x is small or large.

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  • Understanding of Watson's Lemma
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  • Basic concepts of limits in calculus
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[PLAIN]http://img42.imageshack.us/img42/8669/20183046.jpg

Need to show it is approx. equal to (1/3)!/x^(1/3)

Any suggestion of further substitution? I need to change the limits.
 
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Any ideas? Been thinking about this for a while now, still stumped :-\ Shame as I can do all the other questions.
 
integration by parts is usually the way to go with these. There are two different ways to go about ths depending in x is small or large.
 

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