Andradas Heranz, CarlosRecio, TomásTabera, Luis F.Rafael Sendra, J.Villarino, Carlos2023-06-202023-06-2020110167-839610.1016/j.cagd.2010.12.001https://hdl.handle.net/20.500.14352/42069Let K subset of R be a computable field. We present an algorithm to decide whether a proper rational parametrization of a ruled surface, with coefficients in K((i), can be properly reparametrized over a real (i.e. embedded in R) finite field extension of K. Moreover, in the affirmative case, the algorithm provides a proper parametrization with coefficients in a real extension of K of degree at most 2.engjournal articlehttp://www.sciencedirect.com/science/article/pii/S016783961000124Xhttp://www.sciencedirect.comrestricted access512.72/.75515.162.4CurvasSuperficiesIngeniería del soporte lógicoSoftwareGeometria algebraica3304.16 Diseño Lógico1201.01 Geometría Algebraica