A Multiclassifier based Document Categorization System: profiting from the Singular Value Decomposition Dimensionality Reduction Technique Ana Zelaia author Iñaki Alegria author Olatz Arregi author Basilio Sierra author 2006 text Proceedings of the Workshop on Learning Structured Information in Natural Language Applications conference publication zelaia-etal-2006-multiclassifier https://aclanthology.org/W06-2604/ 2006