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Abstract The decomposition of ocean dynamics into a superposition of waves is based on a linear approximation of the equations of fluid mechanics, which, in particular, neglects convective effects. For small-amplitude motions, these couplings can be …

Documents and Media Download the support material Abstract We consider the problem of approximating a subset M of a Hilbert space X by a low-dimensional manifold M n . A large class of nonlinear methods can be described by a decoder D : IR n → X whose …

Abstract The first lecture will examine the circumstances surrounding the emergence of the concept of food sovereignty. Driven by the transnational peasant movement La Via Campesina in the early 1990s, the idea of food sovereignty was put forward to offer …

Abstract Inertial and internal waves caused by ocean rotation and stratification are governed by continuous-spectrum propagators, and their couplings—even weak ones—cannot be analyzed using envelope equation techniques. The emergence of energy fluxes in …

Abstract Understanding how to optimally approximate general compact sets using finite-dimensional spaces is of central interest for designing efficient numerical methods in forward simulation or inverse problems. The concept of n-width, introduced in 1936 …

Abstract The second lecture will examine how the Common Agricultural Policy (CAP), launched in Europe in the late 1950s, embodied from the outset a productivist model focused on increasing yields to ensure food security for the European continent. This …

Abstract Resonance phenomena can lead to large-amplitude fluctuations that can no longer be analyzed perturbatively, yet play a fundamental role either because of their impact (extreme events) or because they profoundly alter the nature of the physical …