@charliewood on Jean Écalle’s resurgence theory—how to go beyond the pertubation theory of divergent series in quantum field theory, to the underlying exact result—
https://www.quantamagazine.org/alien-calculus-could-save-particle-physics-from-infinities-20230406/
I can’t remotely keep up with this, but it strikes me as a very big deal.
#qft #DivergentSeries #jeanecalle