Universal exact solutions for multiphysical inhomogeneities and inclusions in Fourier space

Proceedings of the National Academy of Sciences, Volume 122, Issue 43, October 2025. <br/>SignificanceUnderstanding the fields induced by material inhomogeneities has been central to physics and materials science, with foundational work by Maxwell, Rayleigh, and Einstein. Eshelby’s equivalent inclusion method (EIM) was revolutionary but …