Fisher-Schur Predictive Geometry: Thickness-Free Boundary Tomography from Equilibrium Fluctuations

Preprint and reproducible analysis package for a boundary-only inference framework connecting equilibrium Fisher information, Schur-reduced response, Dirichlet-to-Neumann geometry, an exact thickness-free two-face determinant, finite-element corrections, non-Gaussian validation, and experimental two-port tests across multiple physical lengths. Third-party raw measurements are not redistributed.