Fernando Galván, José FranciscoGamboa Mutuberria, José Manuel2023-06-202023-06-2020060021-217210.1007/BF02771779https://hdl.handle.net/20.500.14352/49904We obtain new necessary conditions for an n-dimensional semialgebraic subset of R-n to be a polynomial image of R-n. Moreover, we prove that a large family of planar bidimensional semialgebraic sets with piecewise linear boundary are images of polynomial or regular maps, and we estimate in both cases the dimension of their generic fibers.engjournal articlehttp://www.springerlink.com/content/0021-2172/http://www.springerlink.com/open access512.7Geometria algebraica1201.01 Geometría Algebraica