Geometry at the frontier : symmetries and moduli spaces of algebraic varieties : 2016-2018 workshops Geometry at the Frontier, November 2016, November 2017, November 2018, Universidad [...] / Paola Comparin, Eduardo Esteves, Herbert Lange, Sebastián Reyes-Carocca, Rubí E. Rodríguez, editors. Providence, Rhode Island : American Mathematical Society, [2021]