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- Convertible Subspaces of Hessenberg-Type MatricesPublication . Cruz, Henrique F. Da; Rodrigues, Ilda Inácio; Serôdio, Rogério; Simões, A. M.; Velhinho, JoseWe describe subspaces of generalized Hessenberg matrices where the determinant is convertible into the permanent by affixing ± signs. An explicit characterization of convertible Hessenberg-type matrices is presented. We conclude that convertible matrices with the maximum number of nonzero entries can be reduced to a basic set.
- VI Workshop on Computational Data Analysis and Numerical Methods: Book of AbstractsPublication . Simões, A. M.; Nunes, Célia; Inácio, Ilda; Grilo, Luis; Carapau, FernandoThis Workshop takes place at the University of Beira Interior, located in the beautiful city of Covilhã, Portugal. The host institution, as well as the Polytechnic Institute of Tomar and the University of Évora have committed themselves tothis challenge, hoping that the final result may exceed the expectations of the participants ,sponsors and organizers. [...]