Discussing Mathematics (IMAGE) American Mathematical Society Caption In this 2008 photo from the UNL department are (left to right) graduate student Deanna Dreher, graduate student Raegan Higgins, faculty member Mark Walker, and graduate student Suanne Au. Higgins is now a visiting assistant professor at Texas Tech University. Credit Department of Mathematics, University of Nebraska-Lincoln. Usage Restrictions For re-use, obtain permission from Department of Mathematics, University of Nebraska-Lincoln. 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.