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physics.geo-ph2026
Higher--order gradient modeling of velocity dispersion in tight sandstones with implications to agroseismology
Rafael Abreu, Ashay Motghare, Chahana Nagesh +2
Modeling frequency-dependent shear-wave propagation in fluid-saturated porous rocks remains a challenge today because existing poroelastic theories generally rely a large number of…
physics.geo-ph2025
On the Fréchet interaction density of certain wave equations
Rafael Abreu, Chahana Nagesh
We extend the adjoint method to complex-valued PDEs and introduce the \emph{Fréchet interaction density}, as the most fundamental interaction from which Fréchet sensitivity kernels…