Lutz Volkmann

ORCID

Publication Activity (10 Years)

Years Active: 1989-2024
Publications (10 Years): 51

Top Venues

Discuss. Math. Graph Theory

Discret. Appl. Math.

Ars Comb.

J. Comb. Optim.

Publications

Seyed Mahmoud Sheikholeslami, Lutz Volkmann
New bounds on the outer-independent total double Roman domination number. Discret. Math. Algorithms Appl. 16 (4) (2024)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Outer independent total double Italian domination number. Comput. Sci. J. Moldova 32 (1) (2024)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Total Italian domatic number of graphs. Comput. Sci. J. Moldova 31 (2) (2023)
Lutz Volkmann
Double Roman and double Italian domination. Discuss. Math. Graph Theory 43 (3) (2023)
Doost Ali Mojdeh, Iman Masoumi, Lutz Volkmann
Restrained double Roman domination of a graph. RAIRO Oper. Res. 56 (4) (2022)
Lutz Volkmann
Restrained Roman and restrained Italian domatic numbers of graphs. Discret. Appl. Math. 322 (2022)
Mustapha Chellali, Nader Jafari Rad, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
The Roman domatic problem in graphs and digraphs: a survey. Discuss. Math. Graph Theory 42 (3) (2022)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Nordhaus-Gaddum type inequalities on the total Italian domination number in graphs. RAIRO Oper. Res. 56 (4) (2022)
Xiaolin Wang, Yaojun Chen, Peter Dankelmann, Yubao Guo, Michel Surmacs, Lutz Volkmann
Oriented diameter of maximal outerplanar graphs. J. Graph Theory 98 (3) (2021)
Rana Khoeilar, Hossein Karami, Mustapha Chellali, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Nordhaus-Gaddum type results for connected and total domination. RAIRO Oper. Res. 55 (Supplement) (2021)
Zhen-Mu Hong, Zheng-Jiang Xia, Fu-Yuan Chen, Lutz Volkmann
Sufficient Conditions for Graphs to Be k -Connected, Maximally Connected, and Super-Connected. Complex. 2021 (2021)
Hamideh Aram, Nasrin Dehgardi, Seyed Mahmoud Sheikholeslami, Mina Valinavaz, Lutz Volkmann
Domination, independent domination number and 2-independence number in trees. Discuss. Math. Graph Theory 41 (1) (2021)
R. Khoeilar, Hossein Karami, Mustapha Chellali, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
A proof of a conjecture on the differential of a subcubic graph. Discret. Appl. Math. 287 (2020)
Doost Ali Mojdeh, Lutz Volkmann
Roman {3}-domination (double Italian domination). Discret. Appl. Math. 283 (2020)
Lutz Volkmann
The double Roman domatic number of a digraph. Discuss. Math. Graph Theory 40 (4) (2020)
Doost Ali Mojdeh, Babak Samadi, Lutz Volkmann
Nordhaus-Gaddum type inequalities for multiple domination and packing parameters in graphs. Contributions Discret. Math. 15 (1) (2020)
Mustapha Chellali, Nader Jafari Rad, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Varieties of Roman domination II. AKCE Int. J. Graphs Comb. 17 (3) (2020)
Zehui Shao, Doost Ali Mojdeh, Lutz Volkmann
Total Roman {3}-domination in Graphs. Symmetry 12 (2) (2020)
Sakineh Nazari-Moghaddam, Lutz Volkmann
Critical concept for double Roman domination in graphs. Discret. Math. Algorithms Appl. 12 (02) (2020)
Majid Hajian, Nader Jafari Rad, Lutz Volkmann
Bounds on the fair total domination number in trees and unicyclic graphs. Australas. J Comb. 74 (2019)
Xiaodan Chen, Guoliang Hao, Lutz Volkmann
-domination number of a digraph. Discuss. Math. Graph Theory 39 (1) (2019)
Lutz Volkmann
The Roman {2}-domatic number of graphs. Discret. Appl. Math. 258 (2019)
Lutz Volkmann
Sufficient conditions for maximally edge-connected and super-edge-connected graphs depending on the clique number. Discuss. Math. Graph Theory 39 (2) (2019)
Zehui Shao, Seyed Mahmoud Sheikholeslami, Marzieh Soroudi, Lutz Volkmann, Xinmiao Liu
On the co-Roman domination in graphs. Discuss. Math. Graph Theory 39 (2) (2019)
Jafar Amjadi, Sakineh Nazari-Moghaddam, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
An upper bound on the double Roman domination number. J. Comb. Optim. 36 (1) (2018)
Sebastian Milz, Lutz Volkmann
Degree sequence conditions for maximally edge-connected and super-edge-connected digraphs depending on the clique number. Discret. Math. 341 (2) (2018)
Lutz Volkmann
Lower bounds on the signed k-domination number of graphs. Ars Comb. 135 (2017)
Masoud Atapour, Nasrin Dehgardi, Lutz Volkmann
-domination numbers in directed graphs. RAIRO Oper. Res. 51 (4) (2017)
Leila Asgharsharghi, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
-domination in graphs. Discuss. Math. Graph Theory 37 (1) (2017)
S. M. Hosseini Moghaddam, Doost Ali Mojdeh, Babak Samadi, Lutz Volkmann
On the signed 2-independence number of graphs. Electron. J. Graph Theory Appl. 5 (1) (2017)
Zhibing Chen, Guifu Su, Lutz Volkmann
Sufficient conditions on the zeroth-order general Randić index for maximally edge-connected graphs. Discret. Appl. Math. 218 (2017)
Lutz Volkmann
-domatic number of a graph. Discuss. Math. Graph Theory 37 (4) (2017)
Wei Meng, Jia Guo, Mei Lu, Yubao Guo, Lutz Volkmann
Universal arcs in local tournaments. Discret. Math. 340 (12) (2017)
Jafar Amjadi, Leila Asgharsharghi, Nasrin Dehgardi, Michitaka Furuya, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
The k-rainbow reinforcement numbers in graphs. Discret. Appl. Math. 217 (2017)
A. Bahremandpour, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Roman game domination number of a graph. J. Comb. Optim. 33 (2) (2017)
Lutz Volkmann
Signed total Roman domination in digraphs. Discuss. Math. Graph Theory 37 (1) (2017)
Jafar Amjadi, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Rainbow restrained domination numbers in graphs. Ars Comb. 124 (2016)
Lutz Volkmann
Signed Roman k-domination in Digraphs. Graphs Comb. 32 (3) (2016)
Nader Jafari Rad, Lutz Volkmann
Generalization of the total outer-connected domination in graphs. RAIRO Oper. Res. 50 (2) (2016)
Nader Jafari Rad, Lutz Volkmann
Matchings in 4-total restrained domination vertex critical graphs. Ars Comb. 128 (2016)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Signed (j, k)-domatic number of graphs. Ars Comb. 126 (2016)
Lutz Volkmann
Signed total Roman domination in graphs. J. Comb. Optim. 32 (3) (2016)
Lutz Volkmann
On the signed total Roman domination and domatic numbers of graphs. Discret. Appl. Math. 214 (2016)
Hossein Abdollahzadeh Ahangar, Leila Asgharsharghi, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Signed mixed Roman domination numbers in graphs. J. Comb. Optim. 32 (1) (2016)
Hossein Abdollahzadeh Ahangar, Jafar Amjadi, Seyed Mahmoud Sheikholeslami, Lutz Volkmann, Yancai Zhao
Signed Roman edge domination numbers in graphs. J. Comb. Optim. 31 (1) (2016)
Lutz Volkmann
The signed Roman k-domatic number of digraphs. Australas. J Comb. 64 (2016)
Seyyed Mehdi Hosseini Moghaddam, Doost Ali Mojdeh, Babak Samadi, Lutz Volkmann
New bounds on the signed total domination number of graphs. Discuss. Math. Graph Theory 36 (2) (2016)
Nader Jafari Rad, Lutz Volkmann
Total restrained reinforcement in graphs. AKCE Int. J. Graphs Comb. 13 (1) (2016)
Michael A. Henning, Lutz Volkmann
Signed Roman k-Domination in Graphs. Graphs Comb. 32 (1) (2016)
Nader Jafari Rad, Lutz Volkmann
Edge-Removal and Edge-Addition in α-Domination. Graphs Comb. 32 (3) (2016)
Hossein Abdollahzadeh Ahangar, Jafar Amjadi, Seyed Mahmoud Sheikholeslami, Vladimir Samodivkin, Lutz Volkmann
On the rainbow restrained domination number. Ars Comb. 125 (2016)
Abdollah Khodkar, Babak Samadi, Lutz Volkmann
-independence number in graphs. Discuss. Math. Graph Theory 35 (4) (2015)
Lutz Volkmann
The signed Roman k-domatic number of a graph. Discret. Appl. Math. 180 (2015)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Signed Roman domination in digraphs. J. Comb. Optim. 30 (3) (2015)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
The signed Roman domatic number of a digraph. Electron. J. Graph Theory Appl. 3 (1) (2015)
Odile Favaron, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Signed k-domatic numbers of graphs. Ars Comb. 123 (2015)
M. Atapour, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Global Roman Domination in Trees. Graphs Comb. 31 (4) (2015)
Lutz Volkmann
)-domatic number of graphs. Discuss. Math. Graph Theory 35 (4) (2015)
Michael A. Henning, Lutz Volkmann
Signed Roman k-domination in trees. Discret. Appl. Math. 186 (2015)
Jafar Amjadi, Negar Mohammadi, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
-rainbow bondage number of a digraph. Discuss. Math. Graph Theory 35 (2) (2015)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Signed star (j, k)-domatic numbers of digraphs. Discret. Math. Algorithms Appl. 7 (2) (2015)
Nasrin Dehgardi, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
The k-rainbow bondage number of a graph. Discret. Appl. Math. 174 (2014)
Mostafa Blidia, Ahmed Bouchou, Lutz Volkmann
Bounds on the k-independence and k-chromatic numbers of graphs. Ars Comb. 113 (2014)
Lutz Volkmann
Smallest regular and almost regular triangle-free graphs without perfect matchings. Ars Comb. 111 (2013)
Lutz Volkmann
Signed total (j, k)-domatic numbers of graphs. Australas. J Comb. 57 (2013)
Lutz Volkmann
Complementary cycles in almost regular multipartite tournaments, where one cycle has length four. Discret. Appl. Math. 161 (13-14) (2013)
Nader Jafari Rad, Lutz Volkmann
A note on the independent domination number in graphs. Discret. Appl. Math. 161 (18) (2013)
Lutz Volkmann
Bounds on the signed 2-independence number in graphs. Discuss. Math. Graph Theory 33 (4) (2013)
Hamideh Aram, S. Norouzian, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
The distance Roman domination numbers of graphs. Discuss. Math. Graph Theory 33 (4) (2013)
Nader Jafari Rad, Lutz Volkmann
Roman Domination Dot-critical Graphs. Graphs Comb. 29 (3) (2013)
Dirk Meierling, Lutz Volkmann
Sufficient conditions for triangle-free graphs to be optimally restricted edge-connected. Discret. Appl. Math. 160 (12) (2012)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
}-domatic number of digraphs. Discuss. Math. Graph Theory 32 (3) (2012)
Lutz Volkmann
On regular (2, q)-extendable graphs. Ars Comb. 105 (2012)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
-rainbow domatic number of a graph. Discuss. Math. Graph Theory 32 (1) (2012)
Mustapha Chellali, Odile Favaron, Adriana Hansberg, Lutz Volkmann
k-Domination and k-Independence in Graphs: A Survey. Graphs Comb. 28 (1) (2012)
Lutz Volkmann
Signed 2-independence in digraphs. Discret. Math. 312 (2) (2012)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Signed total {k}-domination and {k}-Domatic numbers of Graphs. Discret. Math. Algorithms Appl. 4 (1) (2012)
Lutz Volkmann
The smallest regular graphs which are not 1-extendable. Ars Comb. 104 (2012)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
The total {k}-domatic number of a graph. J. Comb. Optim. 23 (2) (2012)
Adriana Hansberg, Lutz Volkmann
2-domination in bipartite graphs with odd independence number. Australas. J Comb. 51 (2011)
Lutz Volkmann
Signed domination and signed domatic numbers of digraphs. Discuss. Math. Graph Theory 31 (3) (2011)
E. Ebrahimi Targhi, Nader Jafari Rad, Lutz Volkmann
Unique response Roman domination in graphs. Discret. Appl. Math. 159 (11) (2011)
Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Signed star k-domatic number of a graph. Contributions Discret. Math. 6 (2) (2011)
Adriana Hansberg, Lutz Volkmann
On 2-domination and independence domination numbers of graphs. Ars Comb. 101 (2011)
Lutz Volkmann
Degree sequence conditions for maximally edge-connected and super-edge-connected oriented graphs depending on the clique number. Ars Comb. 99 (2011)
Andreas Holtkamp, Lutz Volkmann
-free graphs. Australas. J Comb. 51 (2011)
Mustapha Chellali, Lutz Volkmann
Characterization of trees with equal 2-domination number and domination number plus two. Discuss. Math. Graph Theory 31 (4) (2011)
Nader Jafari Rad, Lutz Volkmann
On the Roman Bondage Number of Planar Graphs. Graphs Comb. 27 (4) (2011)
Lutz Volkmann
Upper bounds on the signed total domatic number of graphs. Discret. Appl. Math. 159 (8) (2011)
Nader Jafari Rad, Lutz Volkmann
Roman bondage in graphs. Discuss. Math. Graph Theory 31 (4) (2011)
Dirk Meierling, Seyed Mahmoud Sheikholeslami, Lutz Volkmann
Nordhaus-Gaddum bounds on the k-rainbow domatic number of a graph. Appl. Math. Lett. 24 (10) (2011)
Adriana Hansberg, Dirk Meierling, Lutz Volkmann
-domination in graphs. Int. J. Comput. Math. 88 (5) (2011)
Lutz Volkmann
-alliances in graphs. Discuss. Math. Graph Theory 31 (4) (2011)
Lutz Volkmann
Bounds on the signed domatic number. Appl. Math. Lett. 24 (2) (2011)
Adriana Hansberg, Lutz Volkmann
On the geodetic and geodetic domination numbers of a graph. Discret. Math. 310 (15-16) (2010)
M. Atapour, Seyed Mahmoud Sheikholeslami, Arezoo N. Ghameshlou, Lutz Volkmann
Signed star domatic number of a graph. Discret. Appl. Math. 158 (3) (2010)
Peter Dankelmann, Lutz Volkmann
The Diameter of Almost Eulerian Digraphs. Electron. J. Comb. 17 (1) (2010)
Mustapha Chellali, Lutz Volkmann
Independence and global offensive alliance in graphs. Australas. J Comb. 47 (2010)
Andreas Holtkamp, Lutz Volkmann
On local connectivity of graphs with given clique number. J. Graph Theory 63 (3) (2010)
Dirk Meierling, Lutz Volkmann
Cycle factors in strongly connected local tournaments. Discret. Math. 310 (4) (2010)

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Publication Activity (10 Years)

Top Topics

Top Venues

Lutz Volkmann