Publikationen des Lehrstuhl II für Mathematik

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Publications 2018
Robust flows over time: models and complexity results  
Corinna Gottschalk, Arie M.C.A. Koster, Frauke Liers, Britta Peis, Daniel Schmand, Andreas Wierz
Mathematical Programming, series A 171 (2018), no. 1--2, 55--85.
The matching extension problem in general graphs is co-NP-complete  
Jan Hackfeld, Arie M.C.A. Koster
Journal of Combinatorial Optimization 35 (2018), no. 3, 853--859.
Sufficient conditions for digraphs to be maximally connected and super-connected  
Zhen-Mu Hong, Lutz Volkmann, Jun-Ming Xu
J. University Science Technology China 48 (2018), no. 8, 6 pages.
A Note on Edge Weightings Inducing Proper Vertex Colorings  
Anna Margarethe Limbach, Robert Scheidweiler
Graphs Combin. 34 (2018), no. 6, 1269--1277.
Degree sequence conditions for maximally edge-connected and super-egde-connected digraphs depending on the clique number  
Sebastian Milz, Lutz Volkmann
Discrete Mathematics 341 (2018), no. 2, 484--491.
On chordal graph and line graph squares  
Robert Scheidweiler, Sebastian Wiederrecht
Discrete Applied Mathematics 243 (2018), 239--247.
The Combinatorial k-Deck  
Jan Simon
Graphs Combin. 34 (2018), no. 6, 1597--1618.
Double Roman domination and domatic numbers of graphs  
Lutz Volkmann
Communication in Combinatorics and Optimization 3 (2018), 71--77.
Lower bounds on the signed (total) k-domination number depending on the clique number  
Lutz Volkmann
Communications in Combinatorics and Optimization 3 (2018), 173--178.
Signed total Roman k-domination in graphs  
Lutz Volkmann
J. Combin. Math. Combin. Comput. 105 (2018), 105--116.
The double Roman domatic number of a graph  
Lutz Volkmann
J. Combin. Math. Combin. Comput. 104 (2018), 205--215.
 
Publications 2017
Maximal Roman domination numbers in graphs  
H.A. Ahangar, A. Bahremandpour, S.M. Sheikholeslami, N.D. Soner, Z. Tahmasbzadehbaee, Lutz Volkmann
Util. Math. 103 (2017), 245--258.
The k-rainbow reinforcement numbers in graphs  
J. Amjadi, L. Asgharsharghi, N. Dehgardi, M. Furuya, S.M. Sheikholeslami, Lutz Volkmann
Discrete Appl. Math. 217 (2017), 394--404.
Total Roman domination number of trees  
J. Amjadi, S. Nazari-Moghaddam, S.M. Sheikholeslami, Lutz Volkmann
Australas. J. Combin 69 (2017), 271--285.
Signed Roman edge k-domination in graphs  
L. Asgharsharghi, S.M. Sheikholeslami, Lutz Volkmann
Discuss. Math. Graph Theory 37 (2017), 39--53.
An introduction to the twin signed total k-domination number in directed graphs  
M. Atapour, N. Dehgardi, Lutz Volkmann
RAIRO -- Operations Research 51 (2017), 1331--1343.
Twin signed domination numbers in directed graphs  
M. Atapour, S. Norouzian, S.M. Sheikholeslami, Lutz Volkmann
Algebra Discrete Math. 24 (2017), 71--89.
Roman game domination number of a graph  
A. Bahremandpour, S.M. Sheikholeslami, Lutz Volkmann
J. Comb. Optim. 33 (2017), 713--725.
Perfect f-Matchings and f-Factors in Hypergraphs - A Combinatorial Approach  
Isabel Beckenbach, Robert Scheidweiler
Discrete Mathematics 340 (2017), no. 10, 2499--2506.
Reference points and approximation algorithms in multicriteria discrete optimization  
Christina Büsing, Kai-Simon Goetzmann, Jannik Matuschke, Sebastian Stiller
European Journal of Operational Research 260 (2017), no. 3, 829--840.

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