For lengths 64 and 66, we construct six and seven extremal singly even self-dual codes with
weight enumerators for which no extremal singly even self-dual codes were previously …

In this work, we define a modification of a bordered construction for self-dual codes which
utilises $\lambda $-circulant matrices. We provide the necessary conditions for the …

We generalize several topological indices and introduce the general degree distance of a
connected graph G. For a,b∈R, the general degree distance DD_a,b(G)=v∈V(G)deg_G(v) …