The definition for an n\documentclass[12pt]{minimal}
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\begin{document}$$n$$\end{document}-dimensional Möbius manifold is given; n=2\documentclass[12pt]{minimal}
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\begin{document}$$n=2$$\end{document} yields the classical Möbius band. For n=1,2\documentclass[12pt]{minimal}
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\begin{document}$$n=1, 2$$\end{document} or 4\documentclass[12pt]{minimal}
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\begin{document}$$4$$\end{document}, these manifolds are compact topological monoids, for n=8\documentclass[12pt]{minimal}
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\begin{document}$$n=8$$\end{document}, topological Moufang monoids. All of these manifolds are homeomorphic to retracts of topological groups. If n≤4\documentclass[12pt]{minimal}
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\begin{document}$$n \le 4$$\end{document}, then any compact n\documentclass[12pt]{minimal}
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\begin{document}$$n$$\end{document}-manifold X\documentclass[12pt]{minimal}
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\begin{document}$$X$$\end{document} with connected boundary B\documentclass[12pt]{minimal}
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\begin{document}$$B$$\end{document} admitting the structure of a topological monoid with B\documentclass[12pt]{minimal}
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\begin{document}$$B$$\end{document} being a topological subsemigroup of X\documentclass[12pt]{minimal}
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\begin{document}$$X$$\end{document} is a retract of a topological group. The methods proposed here use the monoid structure of mapping cylinders of compact groups and the higher dimensional analogs of the monoid embedding of the classical Möbius band into the solid torus.
