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Hyperspaces and open monotone maps of hereditarily indecomposable continua
Authors:Michael Levin
Affiliation:Department of Mathematics, Haifa University, Mount Carmel, Haifa 31905, Israel
Abstract:
We prove the following theorems:

Theorem 1. Let $X$ be an $n$-dimensional hereditarily indecomposable continuum. Then there exist $1$-dimensional hereditarily indecomposable continua $Y_1,Y_2,...,Y_n$ and monotone maps $p_i :X longrightarrow Y_i$ such that $(p_1,p_2,...,p_n) :X longrightarrow Y_1 times Y_2 times ... times Y_n$ is an embedding and the space ${mathcal C}(X)$ of all subcontinua of $X$ is embeddable in ${mathcal C}(Y_1) times {mathcal C}(Y_2) times ... times {mathcal C}(Y_n)$ by $K in {mathcal C}(X) longrightarrow (p_1(K),p_2(K),...,p_n(K))$.

Theorem 2. For every open monotone map $varphi $ with non-trivial sufficiently small fibers on a finite dimensional hereditarily indecomposable continuum $X$ with $dim X geq 2$ there exists a $1$-dimensional subcontinuum $Y subset X$ such that $dim varphi (Y) = infty $ and the restriction of $varphi $ to $Y$ is also monotone and open.

The connection between these theorems and other results in Hyperspace theory is studied.

Keywords:Hyperspaces   hereditarily indecomposable continua   open monotone maps
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