Matrix tri-factorization over the tropical semiringOmanović, Amra (Avtor) Oblak, Polona (Avtor) Curk, Tomaž (Avtor) tropical semiringtri-factorizationnetwork structure analysisfour-partition networkTropical semiring has proven successful in several research areas, including optimal control, bioinformatics, discrete event systems, and decision problems. Previous studies have applied a matrix two-factorization algorithm based on the tropical semiring to investigate bipartite and tripartite networks. Tri-factorization algorithms based on standard linear algebra are used to solve tasks such as data fusion, co-clustering, matrix completion, community detection, and more. However, there is currently no tropical matrix tri-factorization approach that would allow for the analysis of multipartite networks with many parts. To address this, we propose the triFastSTMF algorithm, which performs tri-factorization over the tropical semiring. We applied it to analyze a four-partition network structure and recover the edge lengths of the network. We show that triFastSTMF performs similarly to Fast-NMTF in terms of approximation and prediction performance when fitted on the whole network. When trained on a specific subnetwork and used to predict the entire network, triFastSTMF outperforms Fast-NMTF by several orders of magnitude smaller error. The robustness of triFastSTMF is due to tropical operations, which are less prone to predict large values compared to standard operations.20232023-08-24 09:53:57Članek v reviji148483UDK: 004:51ISSN pri članku: 2169-3536DOI: 10.1109/ACCESS.2023.3287833COBISS_ID: 162079235sl