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We characterize, using commuting zero-flux homologies, those volumepreserving vector fields on a 3-manifold that are ...
In this paper we study a number of conjectures on the behavior of the value distribution of eigenfunctions. On the two ...
Let Σ be an oriented compact hypersurface in the round sphere Sn or in the flat torus Tn, n≥3. In the case of the torus, ...