Publications

This is a list of publications related to GeomScale activities.

PreprintsPermalink

• A. Chalkis, V. Fisikopoulos, E. Tsigaridas, H. Zafeiropoulos - dingo: a Python package for metabolic flux sampling, bioRxiv, 2023.

Conference ProceedingsPermalink

• C. Bachelard, A. Chalkis, V. Fisikopoulos, E. Tsigaridas, Randomized geometric tools for anomaly detection in stock markets, Proceedings of Machine Learning Research, AISTATS, 2023.

• A. Chalkis, C. Katsamaki, J. Tonelli-Cueto, On the Error of Random Sampling: Uniformly Distributed Random Points on Parametric Curves, ISSAC ‘22: Proceedings of the 2022 International Symposium on Symbolic and Algebraic Computation. ACM, 2022.

• A. Chalkis, V. Fisikopoulos, E. Tsigaridas, H. Zafeiropoulos - Geometric algorithms for sampling the flux space of metabolic networks, Proceedings of the 37th International Symposium on Computational Geometry, 2021.

• A. Chalkis, V. Fisikopoulos, P. Repouskos, E. Tsigaridas - Sampling from feasible sets of SDPs and volume approximation. SIGSAM Communications in Computer Algebra. ACM, 2020 (Distinguished poster award).

• A. Chalkis, I.Z. Emiris, V. Fisikopoulos - Practical Volume Estimation of Zonotopes by a New Annealing Schedule for Cooling Convex Bodies. Mathematical Software – ICMS 2020. ICMS 2020. Lecture Notes in Computer Science, Springer.

• L. Cales, A. Chalkis, I.Z. Emiris, V. Fisikopoulos - Practical volume computation of structured convex bodies, and an application to modeling portfolio dependencies and financial crises. Proceedings of Annual Symposium on Computational Geometry, 2018.

• E. Anagnostopoulos, I.Z. Emiris, V. Fisikopoulos - Polytope Membership in High Dimension. LNCS Proceedings of 5th International Symposium on Combinatorial Optimization, 2018.

• I.Z. Emiris, V. Fisikopoulos - Efficient random-walk methods for approximating polytope volume. Proceedings of 30th ACM Annual Symposium on Computational Geometry, 2014.

Journal ArticlesPermalink

• A. Chalkis, V. Fisikopoulos, M. Papachristou, E. Tsigaridas - Truncated Log-concave Sampling for Convex Bodies with Reflective Hamiltonian Monte Carlo, ACM Transactions on Mathematical Software, 2023.

• A Chalkis, I.Z. Emiris, V. Fisikopoulos, P. Repouskos, E. Tsigaridas, Efficient sampling in spectrahedra and volume approximation, Linear Algebra and its Applications, Elsevier, 2022.

• A Chalkis, I.Z. Emiris, V. Fisikopoulos, A Practical Algorithm for Volume Estimation based on Billiard Trajectories and Simulated Annealing, ACM Journal of Experimental Algorithmics, 2022.

• A. Chalkis, V. Fisikopoulos - volesti: Volume Approximation and Sampling for Convex Polytopes in R, The R Journal, 2021.

• A. Chalkis, E. Christoforou, I.Z. Emiris, T. Dalamagas, Modeling asset allocations and a new portfolio performance score, Digital Finance, Springer, 2021.

• I.Z.Emiris, V.Fisikopoulos - Practical polytope volume approximation. ACM Transactions on Mathematical Software, vol 44, issue 4, 2018.