Resumen: We construct one-frequency trigonometric spline curves with a de Boor-like algorithm for evaluation and analyze their shape-preserving properties. The convergence to quadratic B-spline curves is also analyzed. A fundamental tool is the concept of the normalized B-basis, which has optimal shape-preserving properties and good symmetric properties. Idioma: Inglés DOI: 10.3390/sym15081551 Año: 2023 Publicado en: Symmetry 15, 8 (2023), 1551 [22 pp.] ISSN: 2073-8994 Factor impacto JCR: 2.2 (2023) Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 50 / 134 = 0.373 (2023) - Q2 - T2 Factor impacto CITESCORE: 5.4 - Computer Science (miscellaneous) (Q1) - Mathematics (all) (Q1) - Physics and Astronomy (miscellaneous) (Q1) - Chemistry (miscellaneous) (Q2)