| PROBLEM SESSION 1 |  |   |  | 
 | PROBLEM SESSION 2 |  |   |  | 
| Bailey |  Levi graphs and concurrence graphs as tools to evaluate block designs  |   |   |  | 
| Buser | Jacobians of degenerate Riemann surfaces and graphs |   |   |  | 
| Chepoi | A topological characterization of basis graphs of matroids  |  |   |  | 
| Cioaba | Eigenvalues and Structure of Graphs |  |   |  | 
| Courcelle | Automata based graph algorithms for logically defined problems 1 |   |   |   | 
| Courcelle | Automata based graph algorithms for logically defined problems 2 |   |   |  | 
| Courcelle | Automata based graph algorithms for logically defined problems 3 |   |   |  | 
| Dodziuk | Difference equations on graphs |    |   |   | 
| Gadouleau | Entropy and closure of directed graphs  |  |   |  | 
| Grabowski | Combinatorics related to spectral theory of random walks on lamplighter groups |  |   |  | 
| Haemers | Spectra of Graphs 1: Spectral characterizations |   |   |  | 
| Haemers | Spectra of Graphs 2: Maximal energy |   |   |  | 
| Helfgott | Growth in groups: ideas and perspectives  |   |   |  | 
| Hoffman | Expander graphs from groups of Kac-Moody type and generalizations |   |   |  | 
| Huber | Randomized Rumour Spreading |   |   |  | 
| Ivrissimtzis | Spectral properties of Platonic graphs and a new family of trivalent expanders |   |   |  | 
| Jackson | Rigidity of graphs and frameworks |   |   |  | 
| Jerrum | The Tutte polynomial:  sign and approximability |   |   |  | 
| Kang | Arrangements of pseudocircles and circles |   |   |  | 
| Kawarabayashi | Property testing for sparse graphs - Structural graph theory meets property testing |   |   |  | 
| Keller | On negative curvature and spectrum of graph Laplacians |  |   |  | 
| Kral | Limits of graphs and permutations 1 |  |   |  | 
| Kral | Limits of graphs and permutations 2 |  |   |  | 
| Kral | Limits of graphs and permutations 3 |  |   |  | 
| Lenz | Spectral theory of graphs and Dirichlet forms via intrinsic metrics 1 |  |   |  | 
| Lenz | Spectral theory of graphs and Dirichlet forms via intrinsic metrics 2 |  |   |  | 
| Liu | Ricci curvature and spectra estimates on graphs |   |   |  | 
| Lledo | Spectral gaps for periodic discrete and metric graphs |   |   |  | 
| Lo | Proof of the 1-factorization and Hamilton decomposition conjectures |   |   |  | 
| Mohar | On median eigenvalues of graphs  |   |   |  | 
| Niedermeier | Exploiting Graph Structure in Multivariate Algorithmics  |   |   |  | 
| Nixon | Symmetric frameworks on cylinders and cones |   |   |  | 
| Patel | A conjecture of Thomassen on Hamiltonian cycles in highly connected tournaments |   |   |  | 
| Pollicott | Nonlinear Perron-Frobenius-Ruelle Theorems |  |   |  | 
| Pyatkin | Incidentor coloring: Methods and results |    |   |  | 
| Sharp | A Weil-Petersson metric for graphs |   |   |  | 
| Stark | Poisson approximation of counts of subgraphs in random intersection graphs |   |   |  | 
| Stark | Multivariable Zeta Functions of Graphs |  |   |  | 
| Terras | Finite upper half plane graphs and their connections with modular forms |   |   |  | 
| Trotignon | Truemper configurations |   |   |  | 
| Valette | Euclidean distortion and spectral gap for finite graphs |  |   |  | 
| van Dam | Eigenvalues and distance-regularity of graphs |   |   |  | 
| Vuskovic | Local structural properties and decomposition |   |   |  | 
| Wojciechowski | Intrinsic metrics on infinite graphs |  |   |  |