Non-Perturbative Asymptotic Improvement of Perturbation Theory and Mellin-Barnes Representation

• Видавець: Інститут математики НАН України
• Дата: 2010
• Автори: Friot, S., Greynat, D.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут математики НАН України 2010
• Назва видання: Symmetry, Integrability and Geometry: Methods and Applications
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/146502
• Цитувати: Non-Perturbative Asymptotic Improvement of Perturbation Theory and Mellin-Barnes Representation / S. Friot, D. Greynat // Symmetry, Integrability and Geometry: Methods and Applications. — 2010. — Т. 6. — Бібліогр.: 15 назв. — англ.

Using a method mixing Mellin-Barnes representation and Borel resummation we show how to obtain hyperasymptotic expansions from the (divergent) formal power series which follow from the perturbative evaluation of arbitrary ''N-point'' functions for the simple case of zero-dimensio...