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Listar por autor "Portillo Fernández, José Ramón"                

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      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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      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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      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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      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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      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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      Conexiones ortogonales con vértices prefijados 

      Garrido Vizuete, María de los Angeles; Márquez Pérez, Alberto; Portillo Fernández, José Ramón; Reyes Colume, Pedro (Alberto Márquez, 2002)
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      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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      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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      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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      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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      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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      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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      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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      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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      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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      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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      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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      Memory cost of quantum contextuality 

      Cabello Quintero, Adán; Gühne, Otfried; Kleinmann, Matthias; Larsson, Jan Ake; Portillo Fernández, José Ramón (2011)
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      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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      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 ...