MathDB1 problem
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Ritus' two-loop instanton trans-series conjecture for the Euler–Heisenberg effective Lagrangian
Ritus' conjecture. The weak-field instanton expansion of its non-perturbative imaginary part has the form
Ritus' two-loop instanton trans-series conjecture for the Euler–Heisenberg effective Lagrangian
Ritus' conjecture. The weak-field instanton expansion of its non-perturbative imaginary part has the form