On the fiber product of Riemann surfaces

Ruben A. Hidalgo, Sebastian Reyes-Carocca, Angelica Vega

Let $S_0,S_1$ and $S_2$ be connected Riemann surfaces and let ${\beta }_1:S_1\to S_0$ and ${\beta }_2:S_2\to S_0$ be surjective holomorphic maps. The associated fiber produc…