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 Products of manifolds as codimension $k$ fibrators Bull. Korean Math. Soc. 1999 Vol. 36, No. 1, 79-90 Young-Ho Im Pusan National University Abstract : In this paper, we show that any %cartesian product of a closed orientable $n$-manifold $N_1$ with finite fundamental group and a closed orientable asherical $m$-manifold $N_2$ with hopfian fundamental group, where $\chi (N_1)$ and $\chi (N_2)$ are nonzero, is a codimension 2 fibrator. Moreover, if $\pi_i(N_1)=0$ for $1 is a codimension$k\$ PL fibrator. Keywords : Approximate fibration, PL fibrator, hopfian group, Normally cohopfian group, hopfian manifold MSC numbers : 57N15, 55R65 Full-Text :