M. Andjelić, F. Belardo and Z. Stanić

Preface

D. Cvetković and P. Rowlinson

Slobodan Simić: an appreciation

N. Abreu, J. Alencar, A. Brondani, L. de Lima and C. Oliveira

Graphs with all but two eigenvalues in [$-2,0$]

S. Akbari, S. Dalvandi, F. Heydari and M. Maghasedi

Signed complete graphs with maximum index

M. Andjelić, T. Koledin and Z. Stanić

On regular signed graphs with three eigenvalues

F. Belardo, M. Brunetti and N. Reff

Balancedness and the least Laplacian eigenvalue of some complex unit gain graphs

J.A. Briffa and I. Sciriha

On the displacement of eigenvalues when removing a twin vertex

D.M. Cardoso, G. Pastén and O. Rojo

Graphs with clusters perturbed by regular graphs–-$A_{\alpha}$-spectrum and applications

S.M. Cioabă, R.J. Elzinga and D.A. Gregory

Some observations on the smallest adjacency eigenvalue of a graph

K. Dadedzi, V. Razanajatovo Misanantenaina and S. Wagner

On the distance spectral radius of trees with given degree sequence

Z. Du and C.M. da Fonseca

The number of P-vertices of singular acyclic matrices: An inverse problem

P.W. Fowler, J.B. Gauci, J. Goedgebeur, T. Pisanski and I. Sciriha

Existence of regular nut graphs for degree at most 11

H. Guo and B. Zhou

On the $\alpha$-spectral radius of uniform hypergraphs

W.H. Haemers

Cospectral pairs of regular graphs with different connectivity

S. Kirkland and X. Zhang

Fractional revival of threshold graphs under Laplacian dynamics

V. Nikiforov

Turán's theorem implies Stanley's bound

L.K. Pinheiro, B.S. Souza and V. Trevisan

Determining graphs by the complementary spectrum

P. Rowlinson

On trees as star complements in regular graphs

D. Stevanović, N. Milosavljević and D. Vukičević

A few examples and counterexamples in spectral graph theory

Y.-Y. Tan, J.H. Koolen and Z.-J. Xia

A spectral characterization of the $s$-clique extension of the triangular graphs

J.F. Wang, J. Wang, X. Liu and F. Belardo

Graphs whose $A_\alpha$-spectral radius does not exceed 2