3 papers
math.AG2026
Completion of two-parameter period maps by nilpotent orbits
Haohua Deng, Colleen Robles
We show that every two-parameter period map admits a Kato--Nakayama--Usui completion to a morphism of log manifolds, and the map onto the image is a morphism of compact algebraic s…
math.AG2025
Period maps at infinity
Mark Green, Phillip Griffiths, Colleen Robles
Let be a smooth projective varieity, and a simple normal crossing divisor. Assume that admits a variation of pure, po…
math.AG2025
Analog of Satake-Baily-Borel for period maps
Mark Green, Phillip Griffiths, Colleen Robles
We propose an analog of the Satake--Baily--Borel compactification and Borel's extension theorem for arbitrary period maps. The proposed analog is constructed as a proper topologica…