We consider a fixed contact 3-manifold that admits infinitely many compactStein fillings which are all homeomorphic but pairwise non-diffeomorphic. Eachof these fillings gives rise to a closed contact 5-manifold described as acontact open book whose page is the filling at hand and whose monodromy is theidentity symplectomorphism. We show that the resulting infinitely many contact5-manifolds are all diffeomorphic but pairwise non-contactomorphic. Moreover,we explicitly determine these contact 5-manifolds.
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