Abstract. This paper is an enriched version of our introductory paper on twisted face-pairing 3-manifolds. Just as every edge-pairing of a 2-dimensional disk yields a closed 2-manifold, so also every face-pairing ɛ of a faceted 3-ball P yields a closed 3-dimensional pseudomanifold. In dimension 3, the pseudomanifold may suffer from the defect that it fails to be a true 3-manifold at some of its vertices. The method of twisted face-pairing shows how to correct this defect of the quotient pseudomanifold P/ɛ systematically. The method describes how to modify P by edge subdivision and how to modify any orientation-reversing face-pairing ɛ of P by twisting, so as to yield an infinite parametrized family of face-pairings (Q, δ) whose quotient complexes Q/δ are all closed orientable 3-manifolds. The method is so efficient that, starting even with almost trivial face-pairings ɛ, it yields a rich family of highly nontrivial, yet relatively simple, 3-manifolds. This paper solves two problems raised by the introductory paper: (1) Replace the computational proof of the introductory paper b
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