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Listar por autor "Portillo Fernández, José Ramón"
Mostrando ítems 1-20 de 31
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Artículo
A network approach to analyze neuronal lineage and layer innervation in the Drosophila optic lobes
Valle Rodríguez, Alberto del; Cera López, Martín; Portillo Fernández, José Ramón (Public Library of Science, 2020)The optic lobes of the fruit fly Drosophila melanogaster form a highly wired neural network composed of roughly 130.000 ...
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Artículo
A sufficient degree condition for a graph to contain all trees of size k
Balbuena, Camino; Márquez Pérez, Alberto; Portillo Fernández, José Ramón (Springer, 2011)The Erdös–Sós conjecture says that a graph G on n vertices and number of edges e(G) > n(k − 1)/2 contains all trees of ...
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Ponencia
An algorithm that constructs irreducible triangulations of once-punctured surfaces
Chávez de Diego, María José; Lawrecenko, Serge; Portillo Fernández, José Ramón; Villar Liñán, María Trinidad (2013)A triangulation of a surface is irreducible if there is no edge whose contraction produces another triangulation of the ...
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Artículo
Basic exclusivity graphs in quantum correlations
Cabello Quintero, Adán; Danielsen, Lars Eirik; López Tarrida, Antonio José; Portillo Fernández, José Ramón (American Physical Society, 2013)A fundamental problem is to understand why quantum theory only violates some noncontextuality (NC) inequalities and ...
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Artículo
Compact set of invariants characterizing graph states of up to eight qubits
Cabello Quintero, Adán; López Tarrida, Antonio José; Moreno,, Pilar; Portillo Fernández, José Ramón (American Physical Society, 2009)The set of entanglement measures proposed by Hein, Eisert, and Briegel for n-qubit graph states [Phys. Rev. A 69, 062311 ...
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Ponencia
Conexiones ortogonales con vértices prefijados
Garrido Vizuete, María de los Angeles; Márquez Pérez, Alberto; Portillo Fernández, José Ramón; Reyes Colume, Pedro (Alberto Márquez, 2002) -
Artículo
Cover Contact Graphs
Atienza Martínez, María Nieves; Castro Ochoa, Natalia de; Cortés Parejo, María del Carmen; Garrido Vizuete, María de los Angeles; Grima Ruiz, Clara Isabel; Hernández, Gregorio; Márquez Pérez, Alberto; Moreno, Auxiliadora; Nöllenburg, Martin; Portillo Fernández, José Ramón; Reyes Colume, Pedro; Valenzuela Muñoz, Jesús; Villar Liñán, María Trinidad; Wolff, Alexander (2007)We study problems that arise in the context of covering certain geometric objects (so-called seeds, e.g., points or disks) ...
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Artículo
Cover contact graphs
Atienza Martínez, María Nieves; Castro Ochoa, Natalia de; Cortés Parejo, María del Carmen; Garrido Vizuete, María de los Angeles; Grima Ruiz, Clara Isabel; Hernández, Gregorio; Márquez Pérez, Alberto; Moreno González, Auxiliadora; Nöllenburg, Martin; Portillo Fernández, José Ramón; Reyes Colume, Pedro; Valenzuela Muñoz, Jesús; Villar Liñán, María Trinidad; Wolff, Alexander (2012)We study problems that arise in the context of covering certain geometric objects called seeds (e.g., points or disks) ...
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Artículo
Entanglement in eight-qubit graph states
Cabello Quintero, Adán; López Tarrida, Antonio José; Moreno, Pilar; Portillo Fernández, José Ramón (Elsevier, 2009)Any 8-qubit graph state belongs to one of the 101 equivalence classes under local unitary operations within the Clifford ...
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Artículo
Experimental fully contextual correlations
Amselem, Elias; Danielsen, Lars Eirik; López Tarrida, Antonio José; Portillo Fernández, José Ramón; Bourennane, Mohamed; Cabello Quintero, Adán (American Physical Society, 2012)Quantum correlations are contextual yet, in general, nothing prevents the existence of even more contextual correlations. ...
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Artículo
Fuzzy logic programs as hypergraphs. Termination results
Díaz Moreno, Juan Carlos; Medina, Jesús; Portillo Fernández, José Ramón (Elsevier, 2022)Graph theory has been a useful tool for logic programming in many aspects. In this paper, we propose an equivalent ...
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Artículo
Global structural stability and the role of cooperation in mutualistic systems
Portillo Fernández, José Ramón; Soler Toscano, Fernando; Langa Rosado, José Antonio (Public Library of Science (Plos), 2022)Dynamical systems on graphs allow to describe multiple phenomena from different areas of Science. In particular, many ...
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Artículo
Graph-theoretic approach to Bell experiments with low detection efficiency
Xu, Zhen-Peng; Steinberg, Jonathan; Singh, Jaskaran; López Tarrida, Antonio José; Portillo Fernández, José Ramón; Cabello Quintero, Adán (Cornell University, 2023)Bell inequality tests where the detection efficiency is below a certain threshold ηcrit can be simulated with local ...
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Artículo
Informational structures: A dynamical system approach for integrated information
Esteban Ruiz, Francisco José; Galadí García, Javier Alejandro; Langa Rosado, José Antonio; Portillo Fernández, José Ramón; Soler Toscano, Fernando (Public Library of Science, 2018-09-13)Integrated Information Theory (IIT) has become nowadays the most sensible general theory of consciousness. In addition to ...
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Artículo
Irreductible Triangulations of the Once-Punctured Torus
Lawrencenko, Serge; Sulanke, Thom; Villar Liñán, María Trinidad; Zgonnik, Lyudmila Vladimirovna; Chávez de Diego, María José; Portillo Fernández, José Ramón (Sobolev Institute of Mathematics, 2018)A triangulation of a surface with fixed topological type is called irreducible if no edge can be contracted to a vertex ...
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Artículo
Kochen-Specker set with seven contexts
Lisonek, Petr; Badziag, Piotr; Portillo Fernández, José Ramón; Cabello Quintero, Adán (American Physical Society, 2014)The Kochen-Specker (KS) theorem is a central result in quantum theory and has applications in quantum information. Its ...
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Capítulo de Libro
Labeling Subway Lines
Garrido Vizuete, María de los Angeles; Iturriaga, Claudia; Márquez Pérez, Alberto; Portillo Fernández, José Ramón; Reyes Colume, Pedro; Wolff, Alexander (2001)Graphical features on map, charts, diagrams and graph drawings usually must be annotated with text labels in order to ...
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Artículo
Memory cost of quantum contextuality
Cabello Quintero, Adán; Gühne, Otfried; Kleinmann, Matthias; Larsson, Jan Ake; Portillo Fernández, José Ramón (2011) -
Artículo
Minimal true-implies-false and true-implies-true sets of propositions in noncontextual hidden-variable theories
Cabello Quintero, Adán; Portillo Fernández, José Ramón; Solís, Alberto; Svozil, Karl (American Physical Society, 2018)An essential ingredient in many examples of the conflict between quantum theory and noncontextual hidden variables (e.g., ...
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Artículo
Monochromatic geometric k-factors for bicolored point sets with auxiliary points
Garijo Royo, Delia; Garrido Vizuete, María de los Angeles; Grima Ruiz, Clara Isabel; Márquez Pérez, Alberto; Moreno González, Auxiliadora; Portillo Fernández, José Ramón; Reyes Colume, Pedro; Robles Arias, Rafael; Valenzuela Muñoz, Jesús (2014)Given a bicolored point set S, it is not always possible to construct a monochromatic geometric planar k-factor of S. We ...