# PhD students

### Spyridon Tzimas

*Separators and Cut Problems in Algorithmic Graph Theory*, Department of Mathematics, University of Ioannina, ongoing.

### Athanasios L. Konstantinidis

*Algorithms and Complexity in Graph Modification Problems*, Department of Mathematics, University of Ioannina, ongoing.

# Master students

- Matina Zerva,
*Complexity of the Happy Coloring Problem*, Department of Mathematics, University of Ioannina, October 2018.
- Athanasios L. Konstantinidis,
*Algorithms and Complexity of the Strong Triadic Closure in Classes of Graphs*, Department of Mathematics, University of Ioannina, November 2016.
- Spyridon Tzimas,
*Subset Feedback Vertex Set in Interval Graphs and Permutation Graphs*, Department of Mathematics, University of Ioannina, October 2016.
- Andreas Gribaviotis,
*Algorithms and Experimental Analysis of the Cutwidth Problem in Quasi-Threshold Graphs*, Department of Mathematics, University of Ioannina, December 2015.
- Vagia Mantela,
*Recognition Algorithms and Representations of Strongly Chordal Graphs*, Department of Mathematics, University of Ioannina, November 2014.