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Let $f$ be a homeomorphism of the closed annulus $A$ isotopic to theidentity, and let $X\subset {\rm Int}A$ be an $f$-invariant continuum whichseparates $A$ into two domains, the upper domain $U_+$ and the lower domain$U_-$. Fixing a lift of $f$ to the universal cover of $A$, one defines therotation set $\tilde \rho(X)$ of $X$ by means of the invariant probabilities on$X$, as well as the prime end rotation number $\check\rho_\pm$ of $U_\pm$. Thepurpose of this paper is to show that $\check\rho_\pm$ belongs to$\tilde\rho(X)$ for any separating invariant continuum $X$.

Prime end rotation numbers of invariant separating contunua of annular homeomorphisms