Products of pairs of Dehn twists and maximal real Lefschetz fibrations
Nagoya Mathematical Journal
Cambridge University Press
83 - 132
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We address the problem of existence and uniqueness of a factorization of a given element of the modular group into a product of two Dehn twists. As a geometric application, we conclude that any maximal real elliptic Lefschetz fibration is algebraic. © 2013 by The Editorial Board of the Nagoya Mathematical Journal.