Branched covers and Zariski pairs

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I have investigated branched Galois covers and Zariski pairs. With E.Artal Bartolo and J.-I.Cogolludo, I first wrote a survey article on Zariski pairs. In the survey, main tools and results about Zariski pair up until around 2007 are explained. Also some new results are contained in the survey. Afterward, I have studied 1. veral Galois covers and the two dimensional Cremona group, 2. non-Galois triple covers (a generalization of Zariski's example and pull-back constructions), and 3. splitting curves on double covers and their application to Zariski pairs.