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math.DS2021
Near tangent dynamics in a class of Hamiltonian impact systems
M. Pnueli, V. Rom-Kedar
Tangencies correspond to singularities of impact systems, separating between impacting and non-impacting trajectory segments. The closure of their orbits constitute the singularity…
physics.geo-ph2021
A dynamic-kinematic 3D model for density-driven ocean circulation flows: Construction, global well-posedness and dynamics
Ori Saporta-Katz, Edriss S. Titi, Hezi Gildor +1
Differential buoyancy surface sources in the ocean may induce a density-driven flow that joins faster flow components to create a multi-scale, 3D flow. Potential temperature and sa…