On classes of relations and graphs determined by subobjects and factorobjects

From MaRDI portal
Publication:1250117

DOI10.1016/0012-365X(78)90062-6zbMath0388.05039OpenAlexW2134331399MaRDI QIDQ1250117

Jaroslav Nešetřil, Ales Pultr

Publication date: 1978

Published in: Discrete Mathematics (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/0012-365x(78)90062-6




Related Items (51)

In praise of homomorphismsNote on strong product graph dimensionHomomorphisms to oriented pathsOriented incidence colourings of digraphsOn the complexity of H-coloringFinitely axiomatizable quasivarieties of graphsAxiomatisability and hardness for universal Horn classes of hypergraphsOn multiplicative graphs and the product conjectureConstraint satisfaction, irredundant axiomatisability and continuous colouringMultiplicativity of acyclic digraphsNo finite-infinite antichain duality in the homomorphism poset of directed graphsDualities and dual pairs in Heyting algebrasOn infinite-finite duality pairs of directed graphsGeneralised dualities and maximal finite antichains in the homomorphism order of relational structuresForbidden lifts (NP and CSP for combinatorialists)Grad and classes with bounded expansion. III: Restricted graph homomorphism dualitiesMany Facets of DualitiesThe effect of two cycles on the complexity of colourings by directed graphsInterleaved adjoints of directed graphsColouring, constraint satisfaction, and complexityFlat algebras and the translation of universal Horn logic to equational logicThe axiomatizability of topological prevarietiesPath homomorphismsBoolean topological graphs of semigroups: the lack of first-order axiomatizationDUALIZABILITY OF GRAPHSColored graphs without colorful cyclesA simple proof of the multiplicativity of directed cycles of prime power lengthOn the complexity of colouring by superdigraphs of bipartite graphsOn Sabidussi--Fawcett subdirect representationQuasi-equational bases for graphs of semigroups, monoids and groups.The Algebra of Adjacency Patterns: Rees Matrix Semigroups with ReversionOpen questions related to the problem of Birkhoff and MaltsevPath homomorphisms, graph colorings, and boolean matricesOn maximal objects in classes of (di)graphs determined by prescribed factorobjectsRESIDUAL PROPERTIES OF SIMPLE GRAPHSConnected obstructions to full graph homomorphismsINTERPRETING GRAPH COLORABILITY IN FINITE SEMIGROUPSSubdirect decomposition of \(n\)-chromatic graphsMultiplicativity of acyclic local tournamentsDualities in full homomorphismsHedetniemi's Conjecture and Strongly Multiplicative GraphsA surprising permanence of old motivations (a not-so-rigid story)A note on maxflow-mincut and homomorphic equivalence in matroidsHereditarily hard \(H\)-colouring problemsDualities for Constraint Satisfaction ProblemsStructural Properties of Sparse GraphsMultiplicative graphs and semi-lattice endomorphisms in the category of graphsDuality theorems for finite structures (characterising gaps and good characterisations)Density via duality.Homomorphisms to oriented cyclesHomomorphic image orders on combinatorial structures.



Cites Work


This page was built for publication: On classes of relations and graphs determined by subobjects and factorobjects