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hep-th2026
Resurgent Lambert series from Feynman and beyond
David Broadhurst, Daniele Dorigoni
Lambert series of the form are ubiquitous in mathematical physics. In particular, 2-loop sunrise and 3-loop banana Feynman diagrams yield Lambert series…
hep-th1998
Solving differential equations for 3-loop diagrams: relation to hyperbolic geometry and knot theory
D. J. Broadhurst
In hep-th/9805025, a result for the symmetric 3-loop massive tetrahedron in 3 dimensions was found, using the lattice algorithm PSLQ. Here we give a more general formula, involving…