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We study the topological invariant ϕ of Kwieciński and Tworzewski, particularly beyond the case of mappings with smooth targets. We derive a lower bound for ϕ of a general mapping, which is similarly effective as the upper bound given by Kwieciński and Tworzewski. Some classes of mappings are identified for which the exact value of ϕ can be computed. Also, we prove that the variation of ϕ on the source space of a mapping with a smooth target is semicontinuous in the Zariski topology.
Hadi Seyedinejad, and Ali Zaghian. "On topological classification of complex mappings." Annales Polonici Mathematici 114.3 (2015): 207-217. <http://eudml.org/doc/280741>.
@article{HadiSeyedinejad2015, abstract = {We study the topological invariant ϕ of Kwieciński and Tworzewski, particularly beyond the case of mappings with smooth targets. We derive a lower bound for ϕ of a general mapping, which is similarly effective as the upper bound given by Kwieciński and Tworzewski. Some classes of mappings are identified for which the exact value of ϕ can be computed. Also, we prove that the variation of ϕ on the source space of a mapping with a smooth target is semicontinuous in the Zariski topology.}, author = {Hadi Seyedinejad, Ali Zaghian}, journal = {Annales Polonici Mathematici}, keywords = {topology of complex analytic mappings; invariant of Kwieciński and Tworzewski}, language = {eng}, number = {3}, pages = {207-217}, title = {On topological classification of complex mappings}, url = {http://eudml.org/doc/280741}, volume = {114}, year = {2015}, }
TY - JOUR AU - Hadi Seyedinejad AU - Ali Zaghian TI - On topological classification of complex mappings JO - Annales Polonici Mathematici PY - 2015 VL - 114 IS - 3 SP - 207 EP - 217 AB - We study the topological invariant ϕ of Kwieciński and Tworzewski, particularly beyond the case of mappings with smooth targets. We derive a lower bound for ϕ of a general mapping, which is similarly effective as the upper bound given by Kwieciński and Tworzewski. Some classes of mappings are identified for which the exact value of ϕ can be computed. Also, we prove that the variation of ϕ on the source space of a mapping with a smooth target is semicontinuous in the Zariski topology. LA - eng KW - topology of complex analytic mappings; invariant of Kwieciński and Tworzewski UR - http://eudml.org/doc/280741 ER -