**
Czechoslovak Mathematical Journal, Vol. 55, No. 2, pp. 465-470, 2005
**

#
Homomorphic images and rationalizations

based on the Eilenberg-MacLane spaces

##
Dae-Woong Lee

Department of Mathematics, Chonbuk National University, Chonju, Chonbuk 561-756, the Republic of Korea, e-mail: ` dwlee@math.chonbuk.ac.kr`

**Abstract:** Are there any kinds of self maps on the loop structure whose induced homomorphic images are the Lie brackets in tensor algebra? We will give an answer to this question by defining a self map of $\Omega\Sigma K(\Bbb Z, 2d)$, and then by computing efficiently some self maps. We also study the topological rationalization properties of the suspension of the Eilenberg-MacLane spaces. These results will be playing a powerful role in the computation of the same $n$-type problems and giving us an information about the rational homotopy equivalence.

**Keywords:** Lie bracket, tensor algebra, rationalization, Steenrod power

**Classification (MSC 2000):** 55S37, 55P62

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