Communications of the
Korean Mathematical Society
CKMS

ISSN(Print) 1225-1763 ISSN(Online) 2234-3024

Article

HOME ALL ARTICLES View

Commun. Korean Math. Soc. 2007; 22(2): 289-295

Printed June 1, 2007

Copyright © The Korean Mathematical Society.

Product of PL fibrators as codimension-$k$ fibrators

Young Ho Im, Yongkuk Kim

Pusan National University, Kyungpook National University

Abstract

We describe some conditions under which the product of two groups with certain property is a group with the same property, and we describe some conditions under which the product of hopfian manifolds is another hopfian manifold. As applications, we find some PL fibrators among the product of fibrators.

Keywords: approximate fibration, degree of a map, codimension-$k$ PL fibrator, hopfian manifold, normally cohopfian, sparsely abelian

MSC numbers: Primary 57N15, 55R65; Secondary 57N25, 54B15