4 papers
Nonlinear spectral clustering with C++ GraphBLAS
Dimosthenis Pasadakis, Olaf Schenk, Verner Vlacic +1
Nonlinear reformulations of the spectral clustering method have gained a lot of recent attention due to their increased numerical benefits and their solid mathematical background.…
Fraud Detection in Cryptocurrency Markets with Spatio-Temporal Graph Neural Networks
Lidia Losavio, Luca Persia, Madan Sathe +1
Technological advancements in cryptocurrency markets have increased accessibility for investors, but concurrently exposed them to the risks of market manipulations. Existing fraud…
Nonlinear PageRank Problem for Local Graph Partitioning
Costy Kodsi, Dimosthenis Pasadakis
A nonlinear generalisation of the PageRank problem involving the Moore-Penrose inverse of an incidence matrix is developed for local graph partitioning purposes. The Levenberg-Marq…
Symmetry-breaking symmetry in directed spectral partitioning
Dimosthenis Pasadakis, Raphael S. Steiner, Pál András Papp +2
We break the symmetry in classical spectral bi-partitioning in order to incentivise the alignment of directed cut edges. We use this to generate acyclic bi-partitions and furthermo…