Results 11 to 20 of about 4,000 (161)
Discrete Mathematics, 1998 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Raghunathan, T.T. +2 more
openaire +3 more sources
Rectilinear approximation and volume estimates for hereditary bodies via [0, 1]‐decorated containers
Journal of Graph Theory, Volume 104, Issue 1, Page 104-132, September 2023., 2023 Abstract We use the hypergraph container theory of Balogh–Morris–Samotij and Saxton–Thomason to obtain general rectilinear approximations and volume estimates for sequences of bodies closed under certain families of projections. We give a number of applications of our results, including a multicolour generalisation of a theorem of Hatami, Janson and ...
Victor Falgas‐Ravry +3 more
wiley +1 more source
Associahedra for finite‐type cluster algebras and minimal relations between g‐vectors
Proceedings of the London Mathematical Society, Volume 127, Issue 3, Page 513-588, September 2023., 2023 Abstract We show that the mesh mutations are the minimal relations among the g${\bm{g}}$‐vectors with respect to any initial seed in any finite‐type cluster algebra. We then use this algebraic result to derive geometric properties of the g${\bm{g}}$‐vector fan: we show that the space of all its polytopal realizations is a simplicial cone, and we then ...
Arnau Padrol +3 more
wiley +1 more source
Research trends in combinatorial optimization
International Transactions in Operational Research, Volume 29, Issue 2, Page 667-705, March 2022., 2022 Abstract Real‐world problems are becoming highly complex and therefore have to be solved with combinatorial optimization (CO) techniques. Motivated by the strong increase in publications on CO, 8393 articles from this research field are subjected to a bibliometric analysis.
Jann Michael Weinand +4 more
wiley +1 more source
Walrasian equilibria from an optimization perspective: A guide to the literature
Naval Research Logistics (NRL), Volume 68, Issue 4, Page 496-513, June 2021., 2021 Abstract An ideal market mechanism allocates resources efficiently such that welfare is maximized and sets prices in a way so that the outcome is in a competitive equilibrium and no participant wants to deviate. An important part of the literature discusses Walrasian equilibria and conditions for their existence.
Martin Bichler +2 more
wiley +1 more source
ClusterSets: Optimizing Planar Clusters in Categorical Point Data
Computer Graphics Forum, Volume 40, Issue 3, Page 471-481, June 2021., 2021 Abstract In geographic data analysis, one is often given point data of different categories (such as facilities of a university categorized by department). Drawing upon recent research on set visualization, we want to visualize category membership by connecting points of the same category with visual links.
J. Geiger +7 more
wiley +1 more source
Generalized m‐Polar Fuzzy Positive Implicative Ideals of BCK‐Algebras
Journal of Mathematics, Volume 2021, Issue 1, 2021., 2021 This study focuses on combining the theories of m‐polar fuzzy sets over BCK‐algebras and establishing a new framework of m‐polar fuzzy BCK‐algebras. In this paper, we define the idea of m‐polar fuzzy positive implicative ideals in BCK‐algebras and investigate some related properties.
Anas Al-Masarwah +4 more
wiley +1 more source
Modeling Complex Systems by Structural Invariants Approach
Complexity, Volume 2021, Issue 1, 2021., 2021 When modeling complex systems, we usually encounter the following difficulties: partiality, large amount of data, and uncertainty of conclusions. It can be said that none of the known approaches solves these difficulties perfectly, especially in cases where we expect emergences in the complex system.
Jiri Bila +3 more
wiley +1 more source
Eulerian and Bipartite Binary Delta-matroids
Acta Mathematicae Applicatae Sinica, English Series, 2022 13 pages, 0 figures.
Yan, Qi, Jin, Xian-an
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AKCE International Journal of Graphs and Combinatorics, 2020 Spikes are an important class of 3-connected matroids. For an integer , there is a unique binary r-spike denoted by Zr. When a circuit-hyperplane of Zr is relaxed, we obtain another spike and repeating this procedure will produce other non-binary spikes.
Vahid Ghorbani +2 more
doaj +1 more source