Resumen: Tridiagonal Toeplitz P-matrices, M-matrices and totally positive matrices are characterized. For some classes of tridiagonal matrices and tridiagonal Toeplitz matrices, it is shown that many algebraic computations can be performed with high relative accuracy. Idioma: Inglés DOI: 10.1080/03081087.2021.1884180 Año: 2022 Publicado en: Linear and Multilinear Algebra 70, 19 (2022), 4508-4527 ISSN: 0308-1087 Factor impacto JCR: 1.1 (2022) Categ. JCR: MATHEMATICS rank: 101 / 329 = 0.307 (2022) - Q2 - T1 Factor impacto CITESCORE: 2.5 - Mathematics (Q2)