Zobrazeno 1 - 10
of 1 499
pro vyhledávání: '"A. Diaz Lopez"'
Autor:
Prada, F., Gomez-Merchan, R., Pérez, E., Betancort-Rijo, J. E., Leñero-Bardallo, J. A., Rodríguez-Vázquez, Á., Glez-de-Rivera, G., Díaz-López, S., Cantalapiedra, J. de Elias
We present results from the occultation of Betelgeuse by asteroid (319) Leona on December 12, 2023, observed using a 64x64 pixel Single-Photon Avalanche Diode (SPAD) array mounted on a 10-inch telescope at the AstroCamp Observatory in Nerpio, Southea
Externí odkaz:
http://arxiv.org/abs/2406.14704
Autor:
Diaz-Lopez, Alexander, Ha, Brian, Harris, Pamela E., Rogers, Jonathan, Koss, Theo, Smith, Dorian
If G is a finite connected graph, then an arithmetical structure on $G$ is a pair of vectors $(\mathbf{d}, \mathbf{r})$ with positive integer entries such that $(\diag(\mathbf{d}) - A)\cdot \mathbf{r} = \mathbf{0}$, where $A$ is the adjacency matrix
Externí odkaz:
http://arxiv.org/abs/2406.11183
Autor:
A. De La Fuente, M. Diaz Beya, P. Beneit, C. Botella, A. Fernandez Moreno, A. Sampol, M. Arnan Sangerman, A. Yeguas Bermejo, M. D. L. L. Amigo, J. Labrador, A. Garcia Guinon, A. Garrido, J. Serrano, S. Vives Polo, M. Garcia Fortes, M. J. Sayas, J. M. Bergua, M. T. Olave, F. Vall LLovera, J. Bargay, M. Pereiro Sanchez, R. Garcia Boyero, A. Diaz Lopez, M. Tormo
Publikováno v:
HemaSphere, Vol 6, Pp 422-423 (2022)
Externí odkaz:
https://doaj.org/article/e760e37144674ae1a6ac132296b9a6df
Let $S_n$ be the symmetric group on the set $[n]:=\{1,2,\ldots,n\}$. Given a permutation $\sigma=\sigma_1\sigma_2 \cdots \sigma_n \in S_n$, we say it has a descent at index $i$ if $\sigma_i>\sigma_{i+1}$. Let $\mathcal{D}(\sigma)$ be the set of all d
Externí odkaz:
http://arxiv.org/abs/2405.06177
Let $S_n$ be the symmetric group on the set $\{1,2,\ldots,n\}$. Given a permutation $\sigma=\sigma_1\sigma_2 \cdots \sigma_n \in S_n$, we say it has a peak at index $i$ if $\sigma_{i-1}<\sigma_i>\sigma_{i+1}$. Let $\text{Peak}(\sigma)$ be the set of
Externí odkaz:
http://arxiv.org/abs/2401.10719
Autor:
Mustonen, Otto H. J., Fogh, Ellen, Paddison, Joseph A. M., Mangin-Thro, Lucile, Hansen, Thomas, Playford, Helen, Diaz-Lopez, Maria, Babkevich, Peter, Vasala, Sami, Karppinen, Maarit, Cussen, Edmund J., Rønnow, Henrik M., Walker, Helen C.
Publikováno v:
Chem. Mater. 36, 501-513 (2024)
Quantum spin liquids are highly entangled magnetic states with exotic properties. The $S = 1/2$ square-lattice Heisenberg model is one of the foundational models in frustrated magnetism with a predicted, but never observed, quantum spin liquid state.
Externí odkaz:
http://arxiv.org/abs/2309.14422
Let $G$ be a finite, connected graph. An arithmetical structure on $G$ is a pair of positive integer-valued vectors $(\mathbf{d},\mathbf{r})$ such that $(\text{diag}(\mathbf{d})-A_G)\cdot \mathbf{r}=\textbf{0},$ where the entries of $\mathbf{r}$ have
Externí odkaz:
http://arxiv.org/abs/2301.04167
Publikováno v:
Electron. J. Combin. 31 (2024) 1.5
An arithmetical structure on a finite, connected graph without loops is an assignment of positive integers to the vertices that satisfies certain conditions. Associated to each of these is a finite abelian group known as its critical group. We show h
Externí odkaz:
http://arxiv.org/abs/2301.02114
Autor:
Behrend, Roger E., Castillo, Federico, Chavez, Anastasia, Diaz-Lopez, Alexander, Escobar, Laura, Harris, Pamela E., Insko, Erik
Partial permutohedra are lattice polytopes which were recently introduced and studied by Heuer and Striker. For positive integers $m$ and $n$, the partial permutohedron $\mathcal{P}(m,n)$ is the convex hull of all vectors in $\{0,1,\ldots,n\}^m$ whos
Externí odkaz:
http://arxiv.org/abs/2207.14253
Autor:
Diaz-Lopez, Alexander, Louwsma, Joel
Publikováno v:
Linear Algebra Appl. 656 (2023) 324-344
An arithmetical structure on a finite, connected graph without loops is given by an assignment of positive integers to the vertices such that, at each vertex, the integer there is a divisor of the sum of the integers at adjacent vertices, counted wit
Externí odkaz:
http://arxiv.org/abs/2206.14836