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most citedSome remarks about an effective description of high-frequency wave-packet propagation

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math.DS2024

NLS approximation for a scalar FPUT system on a 2D square lattice with a cubic nonlinearity

Ioannis Giannoulis, Bernd Schmidt, Guido Schneider

We consider a scalar Fermi-Pasta-Ulam-Tsingou (FPUT) system on a square 2D lattice with a cubic nonlinearity. For such systems the NLS equation can be derived to describe the evolu…