New posts in Analyticity

Why can you deform the contour in the integral expression for the Klein-Gordon propagator to get the Euclidean propagator?

How is the free energy of Kosterlitz-Thouless transition smooth yet non-analytic?

Why does Taylor’s series “work”?

Radial ordered commutation relation

Why is analyticity a good mathematical assumption in general relativity?

What is the intuition behind Kramers-Kronig relations?

Gaussian integral with imaginary coefficients and Wick rotation

Free energy functions are analytic or non-analytic in phase transitions?

How to understand "analytical continuation" in the context of instantons?

An integral in Peskin's Quantum Field Theory P. 27