@misc{10498/25643, year = {2021}, month = {7}, url = {http://hdl.handle.net/10498/25643}, abstract = {We propose necessary and sufficient conditions for an integer matrix to be decomposable in terms of its Hermite normal form. Specifically, to each integer matrix, we associate a symmetric integer matrix whose reducibility can be efficiently determined by elementary linear algebra techniques, and which completely determines the decomposability of the first one.}, organization = {This reserach was partially supported by the Ministerio de Economia y Competitividad (Spain)/FEDER-UE under grants PGC2018-096446-B-C21 and MTM2017-84890-P, by the Junta de Extremadura(Spain)/FEDER funds, research group FQM-024, and by the Junta de Andalucia (Spain), research group FQM-366. Document}, publisher = {MDPI}, keywords = {integer matrix}, keywords = {hermite normal form}, keywords = {decomposable matrix}, keywords = {reducible matrix}, keywords = {disconnected graph}, title = {A Note on Decomposable and Reducible Integer Matrices}, doi = {10.3390/sym13071125}, author = {Marijuán, Carlos and Ojeda, Ignacio and Vigneron Tenorio, Alberto}, }