Anaya Ortega, José Guadalupe; Capulín Pérez, Félix; Sánchez Garrido, Mónica
(Revista Integración, 2021-05-17)
Abstract. J. J. Charatonik formulated in 1991 the following problem: What are all mappings that preserve contractibility (noncontractibility) of dendroids?
On the other hand, J. J. Charatonik, W. J. Charatonik, and ...