RT Journal Article T1 Proper real reparametrization of rational ruled surfaces A1 Andradas Heranz, Carlos A1 Recio, Tomás A1 Tabera, Luis F. A1 Rafael Sendra, J. A1 Villarino, Carlos AB Let 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. PB Elsevier SN 0167-8396 YR 2011 FD 2011 LK https://hdl.handle.net/20.500.14352/42069 UL https://hdl.handle.net/20.500.14352/42069 LA eng NO Universidad Complutense NO Banco de Santander-Universidad Complutense NO Ministerio de Ciencia e Innovación DS Docta Complutense RD 10 abr 2025