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In 1940, O. G. Harrold showed that no arc can be the exactly 2-to-1 continuous image of a metric continuum, and in 1947 W. H. Gottschalk showed that no dendrite is a 2-to-1 image. In 2003 we show that no arc-connected treelike continuum is the 2-to-1 image of a continuum.
Jo Heath, and Van C. Nall. "No arc-connected treelike continuum is the 2-to-1 image of a continuum." Fundamenta Mathematicae 180.1 (2003): 11-24. <http://eudml.org/doc/282929>.
@article{JoHeath2003, abstract = {In 1940, O. G. Harrold showed that no arc can be the exactly 2-to-1 continuous image of a metric continuum, and in 1947 W. H. Gottschalk showed that no dendrite is a 2-to-1 image. In 2003 we show that no arc-connected treelike continuum is the 2-to-1 image of a continuum.}, author = {Jo Heath, Van C. Nall}, journal = {Fundamenta Mathematicae}, keywords = {dendroids; -to-1 maps; simple maps; decomposable; indecomposable}, language = {eng}, number = {1}, pages = {11-24}, title = {No arc-connected treelike continuum is the 2-to-1 image of a continuum}, url = {http://eudml.org/doc/282929}, volume = {180}, year = {2003}, }
TY - JOUR AU - Jo Heath AU - Van C. Nall TI - No arc-connected treelike continuum is the 2-to-1 image of a continuum JO - Fundamenta Mathematicae PY - 2003 VL - 180 IS - 1 SP - 11 EP - 24 AB - In 1940, O. G. Harrold showed that no arc can be the exactly 2-to-1 continuous image of a metric continuum, and in 1947 W. H. Gottschalk showed that no dendrite is a 2-to-1 image. In 2003 we show that no arc-connected treelike continuum is the 2-to-1 image of a continuum. LA - eng KW - dendroids; -to-1 maps; simple maps; decomposable; indecomposable UR - http://eudml.org/doc/282929 ER -