Rigobert Fokam Souop

collaborators

4 papers

math.CO2026

Induced Embeddings of Graphs into Abelian Cayley Graphs

Rigobert Fokam Souop, Laurent Bitjoka

For a finite graph $G$ on $n$ vertices, let $η (G)$ denote the least order of a finite abelian group $Γ$ for which $G$ is an induced subgraph of some Cayley graph of $Γ$ . Babai and…

cs.DM2026

The Cayley Completion of a Graph

Rigobert Fokam Souop, Laurent Bitjoka

A finite connected graph is rarely a Cayley graph. We measure how far it is from being one: given $G$ with $n$ vertices and $m$ edges, how few edges must be added, or added and del…

eess.SP2026

Tight Wavelet Frames on Graphs via Isometric Group Embedding

Rigobert Fokam Souop, Laurent Bitjoka

Spectral graph wavelets apply a kernel to the graph Laplacian spectrum. On an irregular graph their analyzing functions inherit a non-canonical eigenbasis, they do not form a tight…

eess.SP2026

Harmonic Analysis on Graphs via Isometric Group Embedding: A Canonical Fourier Transform, Shift, and Convolution for Network Signals

Rigobert Fokam Souop, Laurent Bitjoka

Graph signal processing built on the eigenvectors of a Laplacian or adjacency shift inherits three structural compromises: the eigenbasis is fixed only up to rotation within degene…