A NOVEL LEARNING RATE FUNCTION AND ITS APPLICATION ON THE SVD++ RECOMMENDATION ALGORITHM


A symmetry algebra in double-scaled SYK

The double-scaled limit of the Sachdev-Ye-Kitaev (SYK) model takes the number of fermions and their interaction number to infinity in a coordinated way.In this limit, two entangled copies of the SYK model have a bulk description of sorts known as the "chord Hilbert space".We analyze a symmetry algebra acting on this Hilbert space, generated by the

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Cipactlichthys scutatus, gen. nov., sp. nov. a new Halecomorph (Neopterygii, Holostei) from the Lower Cretaceous Tlayua Formation of Mexico.

Based on specimens from the Lower Cretaceous Tlayua Formation of Mexico, we describe a new genus and species of Halecomorphi, Cipactlichthysscutatus gen.et sp.nov, which exhibits several diagnostic characters such as the dermal bones and the scales with ganoin and highly ornamented by numerous tubercles and ridges; parietal slightly longer than wid

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