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Johansson, Robert
Publications (6 of 6) Show all publications
Johansson, R. & Öhman, L.-D. (2012). Introduktion till högre studier i matematik (1ed.). Liber
Open this publication in new window or tab >>Introduktion till högre studier i matematik
2012 (Swedish)Book (Other academic)
Place, publisher, year, edition, pages
Liber, 2012. p. 158 Edition: 1
Keywords
introduktion, matematik, högskolestudier, komplexa tal, matematisk induktion
National Category
Mathematics
Identifiers
urn:nbn:se:umu:diva-61299 (URN)9789147105366 (ISBN)
Available from: 2012-11-08 Created: 2012-11-08 Last updated: 2024-07-02Bibliographically approved
Johansson, A., Johansson, R. & Markström, K. (2010). Factors of r-partite graphs and bounds for the strong chromatic number. Ars combinatoria, 95, 277-287
Open this publication in new window or tab >>Factors of r-partite graphs and bounds for the strong chromatic number
2010 (English)In: Ars combinatoria, ISSN 0381-7032, Vol. 95, p. 277-287Article in journal (Refereed) Published
Abstract [en]

We give an optimal degree condition for a tripartite graph to have a spanning subgraph consisting of complete graphs of order 3. This result is used to give an upper bound of 2 Delta for the strong chromatic number of n vertex graphs with Delta >= n/6.
Place, publisher, year, edition, pages
Charles Babbage Research Center, 2010
Identifiers
urn:nbn:se:umu:diva-41319 (URN)000276676500025 ()
Available from: 2011-03-23 Created: 2011-03-23 Last updated: 2018-06-08Bibliographically approved
Häggkvist, R. & Johansson, R. (2004). A note on edge-decompositions of planar graphs. Discrete Mathematics, 283(1-3), 263-266
Open this publication in new window or tab >>A note on edge-decompositions of planar graphs
2004 (English)In: Discrete Mathematics, ISSN 0012-365X, Vol. 283, no 1-3, p. 263-266Article in journal (Refereed) Published
Identifiers
urn:nbn:se:umu:diva-9018 (URN)
Available from: 2008-02-26 Created: 2008-02-26 Last updated: 2018-06-09Bibliographically approved
Johansson, R. (2000). On the bipartite case of El Zahár's conjecture. Discrete Mathematics, 219(1-3), 123-134
Open this publication in new window or tab >>On the bipartite case of El Zahár's conjecture
2000 (English)In: Discrete Mathematics, ISSN 0012-365X, Vol. 219, no 1-3, p. 123-134Article in journal (Refereed) Published
Identifiers
urn:nbn:se:umu:diva-9017 (URN)
Available from: 2008-02-26 Created: 2008-02-26 Last updated: 2018-06-09Bibliographically approved
Johansson, R. (2000). Triangle factors in a balanced blown-up triangle. Discrete Mathematics, 211(1-3), 249-254
Open this publication in new window or tab >>Triangle factors in a balanced blown-up triangle
2000 (English)In: Discrete Mathematics, ISSN 0012-365X, Vol. 211, no 1-3, p. 249-254Article in journal (Refereed) Published
Identifiers
urn:nbn:se:umu:diva-9016 (URN)
Available from: 2008-02-26 Created: 2008-02-26 Last updated: 2018-06-09Bibliographically approved
Johansson, R. (1998). An El-Zahár type condition ensuring path-factors. Journal of Graph Theory, 28(1), 39-42
Open this publication in new window or tab >>An El-Zahár type condition ensuring path-factors
1998 (English)In: Journal of Graph Theory, ISSN 0364-9024, Vol. 28, no 1, p. 39-42Article in journal (Refereed) Published
Identifiers
urn:nbn:se:umu:diva-9014 (URN)
Available from: 2008-02-26 Created: 2008-02-26 Last updated: 2018-06-09Bibliographically approved
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