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Resurgent expansion of Lambert series and iterated Eisenstein integrals

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 نشر من قبل Daniele Dorigoni Dr
 تاريخ النشر 2020
  مجال البحث
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We consider special Lambert series as generating functions of divisor sums and determine their complete transseries expansion near rational roots of unity. Our methods also yield new insights into the Laurent expansions and modularity properties of iterated Eisenstein integrals that have recently attracted attention in the context of certain period integrals and string theory scattering amplitudes.



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