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Effect of Transport Noise on Kelvin-Helmholtz instability

Program for simulation of the Kelvin-Helmholtz instability with the point vortex method, with or without viscosity, with or without transport noise. See README.txt for input file specifications. Contact silviamorlacchi@gmail.com for any issue.

A cusped hyperbolic 4-manifold without spin structures

We build a non-compact, orientable, hyperbolic four-manifold of finite volume that does not admit any spin structure.

Exploring 'Forever': Assessing the viability of the new Tropical Forest Forever Facility

Can the new Tropical Forest Forever Facility (TFFF) succeed? The launch of the TFFF at COP30 in Brazil represented a major step toward scaling forest finance. With a promising goal of raising $125 billion for conservation and restoration, the TFFF moves beyond carbon market logic. However, its success depends on fundamental structural changes to ensure genuine climate and biodiversity benefits.

Non-cobordant hyperbolic manifolds

In all dimensions $n \ge 4$ not of the form $4m+3$, we show that there exists a closed hyperbolic $n$-manifold which is not the boundary of a compact $(n+1)$-manifold. The proof relies on the relationship between the cobordism class and the fixed point set of an involution on the manifold, together with a geodesic embedding of Kolpakov, Reid and Slavich. We also outline a possible approach to cover the dimensions $4m+3 \ne 2^k-1$.

Cusp-transitive 4-manifolds with every cusp section

We realize every closed flat 3-manifold as a cusp section of a complete, finite-volume hyperbolic 4-manifold whose symmetry group acts transitively on the set of cusps. Moreover, for every such 3-manifold, a dense subset of its flat metrics can be realized as cusp sections of a cusp-transitive 4-manifold. Finally, we prove that there are a lot of 4-manifolds with pairwise isometric cusps, for any given cusp type.

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5 Altro: [296] Home page macrotipologia

Prodotti recenti

Effect of Transport Noise on Kelvin-Helmholtz instability

A cusped hyperbolic 4-manifold without spin structures

Exploring 'Forever': Assessing the viability of the new Tropical Forest Forever Facility

Non-cobordant hyperbolic manifolds

Cusp-transitive 4-manifolds with every cusp section

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Disciplina SNS