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Investigated are continuous rational maps of nonsingular real algebraic varieties into spheres. In some cases, necessary and sufficient conditions are given for a continuous map to be approximable by continuous rational maps. In particular, each continuous map between unit spheres can be approximated by continuous rational maps.
Kucharz, Wojciech. "Approximation by continuous rational maps into spheres." Journal of the European Mathematical Society 016.8 (2014): 1555-1569. <http://eudml.org/doc/277743>.
@article{Kucharz2014, abstract = {Investigated are continuous rational maps of nonsingular real algebraic varieties into spheres. In some cases, necessary and sufficient conditions are given for a continuous map to be approximable by continuous rational maps. In particular, each continuous map between unit spheres can be approximated by continuous rational maps.}, author = {Kucharz, Wojciech}, journal = {Journal of the European Mathematical Society}, keywords = {real algebraic set; regular map; continuous rational map; semi-algebraic map; approximation; real algebraic set; regular map; continuous rational map; semi-algebraic map; approximation}, language = {eng}, number = {8}, pages = {1555-1569}, publisher = {European Mathematical Society Publishing House}, title = {Approximation by continuous rational maps into spheres}, url = {http://eudml.org/doc/277743}, volume = {016}, year = {2014}, }
TY - JOUR AU - Kucharz, Wojciech TI - Approximation by continuous rational maps into spheres JO - Journal of the European Mathematical Society PY - 2014 PB - European Mathematical Society Publishing House VL - 016 IS - 8 SP - 1555 EP - 1569 AB - Investigated are continuous rational maps of nonsingular real algebraic varieties into spheres. In some cases, necessary and sufficient conditions are given for a continuous map to be approximable by continuous rational maps. In particular, each continuous map between unit spheres can be approximated by continuous rational maps. LA - eng KW - real algebraic set; regular map; continuous rational map; semi-algebraic map; approximation; real algebraic set; regular map; continuous rational map; semi-algebraic map; approximation UR - http://eudml.org/doc/277743 ER -