2 papers
stat.ML2026
Gaussian Invariant Markov Chain Monte Carlo
Michalis K. Titsias, Angelos Alexopoulos, Siran Liu +1
We develop sampling methods, which consist of Gaussian invariant versions of random walk Metropolis (RWM), Metropolis adjusted Langevin algorithm (MALA) and second order Hessian or…
physics.soc-ph2025
A network and machine learning approach to detect Value Added Tax fraud
Angelos Alexopoulos, Petros Dellaportas, Stanley Gyoshev +3
Value Added Tax (VAT) fraud erodes public revenue and puts legitimate businesses at a disadvantaged position thereby impacting inequality. Identifying and combating VAT fraud befor…