
Here's a complex question that requires someone to reason about the input, can you answer it?
In differential geometry, a Nadirashvili surface is an immersed complete bounded minimal surface in R with negative curvature, Eugenio Calabi and Shing-Tung Yau had a question, about whether there was an immersed complete bounded minimal surface in R, Shing-Tung Yau is from Hong Kong and what type of American mathematician?


naturalised
