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University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > Mining Perturbation Theory: Resurgence-Inspired Extrapolation and Analytic Continuation

## Mining Perturbation Theory: Resurgence-Inspired Extrapolation and Analytic ContinuationAdd to your list(s) Download to your calendar using vCal - Gerald Dunne (University of Connecticut)
- Tuesday 27 September 2022, 15:00-17:00
- Seminar Room 2, Newton Institute.
If you have a question about this talk, please contact nobody. ARA2 - Applicable resurgent asymptotics: towards a universal theory What is the best way to extract information from a finite amount of perturbative information? This is a common problem in applications. We may only be able to compute a (small) finite number of coefficients of an expansion of a function about some special parameter point, and we wish to learn about the behaviour near another point (possibly very distant). I will discuss some recent work with Ovidiu Costin using resurgence ideas to address the mathematical question of optimal and near-optimal methods of analytic continuation, and I will illustrate with several applications in quantum field theory. This talk is part of the Isaac Newton Institute Seminar Series series. ## This talk is included in these lists:- All CMS events
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