K3 Surface in 3-space (IMAGE) Utah State University Caption Example of a cross-section of K3 surface in 3-space, similar to a model Utah State University and University of Missouri-St. Louis mathematicians used to examine string dualities between F-theory and heterotic theory in eight dimensions. Credit USU Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.