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pro vyhledávání: '"Romaniello P"'
The Bethe-Salpeter equation has been extensively employed to compute the two-body electron-hole propagator and its poles which correspond to the neutral excitation energies of the system. Through a different time-ordering, the two-body Green's functi
Externí odkaz:
http://arxiv.org/abs/2411.13167
A graph $G$ has the \emph{Perfect Matching Hamiltonian property} (or for short, $G$ is $PMH$) if, for each one of its perfect matchings, there is another perfect matching of $G$ such that the union of the two perfect matchings yields a Hamiltonian cy
Externí odkaz:
http://arxiv.org/abs/2411.09724
Autor:
Labbate, D., Romaniello, F.
A 2-factor of a graph $G$ is a 2-regular spanning subgraph of $G$. We present a survey summarising results on the structure of 2-factors in regular graphs, as achieved by various researchers in recent years.
Comment: 19 pages, 4 figures. arXiv a
Comment: 19 pages, 4 figures. arXiv a
Externí odkaz:
http://arxiv.org/abs/2408.04642
In a recent letter [Phys. Rev. Lett. 131, 216401] we presented the multichannel Dyson equation (MCDE) in which two or more many-body Green's functions are coupled. In this work we will give further details of the MCDE approach. In particular we will
Externí odkaz:
http://arxiv.org/abs/2406.12485
Hedin's equations provide an elegant route to compute the exact one-body Green's function (or propagator) via the self-consistent iteration of a set of non-linear equations. Its first-order approximation, known as $GW$, corresponds to a resummation o
Externí odkaz:
http://arxiv.org/abs/2406.07062
Autor:
Breuval, Louise, Riess, Adam G., Casertano, Stefano, Yuan, Wenlong, Macri, Lucas M., Romaniello, Martino, Murakami, Yukei S., Scolnic, Daniel, Anand, Gagandeep S., Soszyński, Igor
Publikováno v:
The Astrophysical Journal (2024), 973, 30
We present phase-corrected photometric measurements of 88 Cepheid variables in the core of the Small Magellanic Cloud (SMC), the first sample obtained with the Hubble Space Telescope's (HST) Wide Field Camera 3, in the same homogeneous photometric sy
Externí odkaz:
http://arxiv.org/abs/2404.08038
Autor:
Romaniello, Federico
A $k$-bisection of a multigraph $G$ is a partition of its vertex set into two parts of the same cardinality such that every component of each part has at most $k$ vertices. Cui and Liu shown that every claw-free cubic multigraph contains a $2$-bisect
Externí odkaz:
http://arxiv.org/abs/2312.00418
Partition of unity methods (PUMs) on graphs represent straightforward and remarkably adaptable auxiliary techniques for graph signal processing. By relying solely on the intrinsic graph structure, we propose the generation of a partition of unity thr
Externí odkaz:
http://arxiv.org/abs/2311.04299
In this paper, we employ Bayesian optimization to concurrently explore the optimal values for both the shape parameter and the radius in the partition of unity interpolation using radial basis functions. Bayesian optimization is a probabilistic, iter
Externí odkaz:
http://arxiv.org/abs/2311.04289
In this paper, Bayesian optimisation is used to simultaneously search the optimal values of the shape parameter and the radius in radial basis function partition of unity interpolation problem. It is a probabilistic iterative approach that models the
Externí odkaz:
http://arxiv.org/abs/2311.04210