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1
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45149137213
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The effect of two cycles on the complexity of colourings by directed graphs
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J. Bang-Jansen and P. Hell, The effect of two cycles on the complexity of colourings by directed graphs, Discrete Appl. Math. 26 (1990) 1-23.
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(1990)
Discrete Appl. Math.
, vol.26
, pp. 1-23
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Bang-Jansen, J.1
Hell, P.2
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3
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0041505367
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On the complexity of colouring by superdigraphs of bipartite graphs
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J. Bang-Jensen, P. Hell and G. MacGillivray, On the complexity of colouring by superdigraphs of bipartite graphs, Discrete Math. 109 (1992) 27-44.
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(1992)
Discrete Math.
, vol.109
, pp. 27-44
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Bang-Jensen, J.1
Hell, P.2
MacGillivray, G.3
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10
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0042507129
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Ph.D. Thesis, Free University Berlin
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W. Gutjahr, Graph colourings, Ph.D. Thesis, Free University Berlin, 1991.
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(1991)
Graph Colourings
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Gutjahr, W.1
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12
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0001954953
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On multiplicative graphs and the product conjecture
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R. Häggkvist, P. Hell, D.J. Miller and V. Neumann Lara, On multiplicative graphs and the product conjecture, Combinatorica 8 (1988) 71-81.
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(1988)
Combinatorica
, vol.8
, pp. 71-81
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Häggkvist, R.1
Hell, P.2
Miller, D.J.3
Neumann Lara, V.4
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13
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0039375129
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Homomorphisms of graphs and their orientations
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P. Hell and J. Nešetřil, Homomorphisms of graphs and their orientations, Monatsh. Math. 85 (1978) 39-48.
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(1978)
Monatsh. Math.
, vol.85
, pp. 39-48
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Hell, P.1
Nešetřil, J.2
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16
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44049112900
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The core of a graph
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P. Hell and J. Nešetřil, The core of a graph, Discrete Math. 109 (1992) 117-126.
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(1992)
Discrete Math.
, vol.109
, pp. 117-126
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Hell, P.1
Nešetřil, J.2
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17
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0041505365
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Technical Report, KAM series 93-243, Department of Applied Mathematics, Charles University, Prague
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P. Hell, J. Nešetřil and X. Zhu, Duality and polynomial testing of tree homomorphisms, Technical Report, KAM series 93-243, Department of Applied Mathematics, Charles University, Prague, 1993.
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(1993)
Duality and Polynomial Testing of Tree Homomorphisms
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Hell, P.1
Nešetřil, J.2
Zhu, X.3
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18
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0013460461
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Duality of graph homomorphisms
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Paul Erdös is Eighty, Bolyai Society Mathematical Studies, Budapest, Hungary
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P. Hell, J. Nešetřil and X. Zhu, Duality of graph homomorphisms, Combinatorics, Paul Erdös is Eighty, Vol. 2 (Bolyai Society Mathematical Studies, Budapest, Hungary, 1993).
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(1993)
Combinatorics
, vol.2
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Hell, P.1
Nešetřil, J.2
Zhu, X.3
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19
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85027602735
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Duality and polynomial testing of tree homomorphisms
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in print
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P. Hell, J. Nešetřil and X. Zhu, Duality and polynomial testing of tree homomorphisms, Trans. AMS, in print.
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Trans. AMS
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Hell, P.1
Nešetřil, J.2
Zhu, X.3
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20
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0010679294
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Homomorphisms to oriented cycles
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P. Hell, H. Zhou and X. Zhu, Homomorphisms to oriented cycles, Combinatorica 13 (1993) 421-433.
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(1993)
Combinatorica
, vol.13
, pp. 421-433
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Hell, P.1
Zhou, H.2
Zhu, X.3
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21
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0004930728
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Homomorphisms to oriented paths
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P. Hell and X. Zhu, Homomorphisms to oriented paths, Discrete. Math. 132 (1994), 107-114.
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(1994)
Discrete. Math.
, vol.132
, pp. 107-114
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Hell, P.1
Zhu, X.2
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22
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0039704323
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The existence of homomorphisms to oriented cycles
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P. Hell and X. Zhu, The existence of homomorphisms to oriented cycles, SIAM J. Discrete Math., 8 (1995) 208-222.
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(1995)
SIAM J. Discrete Math.
, vol.8
, pp. 208-222
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Hell, P.1
Zhu, X.2
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23
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0039704322
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On the complexity of colourings by vertex-transitive and arc-transitive digraphs
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in press
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G. MacGillivray, On the complexity of colourings by vertex-transitive and arc-transitive digraphs, SIAM J. Discrete Math, in press.
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SIAM J. Discrete Math
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MacGillivray, G.1
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25
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0002364072
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Symmetric graphs and interpretations
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E. Welzl, Symmetric graphs and interpretations, J. Combin. Theory Ser. B 37 (1984) 235-244.
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(1984)
J. Combin. Theory Ser. B
, vol.37
, pp. 235-244
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Welzl, E.1
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26
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85029984631
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A polynomial algorithm for homomorphisms to oriented cycles
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to appear
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X. Zhu, A polynomial algorithm for homomorphisms to oriented cycles, J. Algorithms, to appear.
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J. Algorithms
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Zhu, X.1
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