Professor of Mathematics and Computer Science at the University of California-Davis Jesús A. De Loera will deliver the annual Bernard Society of Mathematics Lecture entitled “Helly’s Theorem: A Jewel of 20th Century Geometry." De Loera will describe a masterpiece of geometry discovered by Eduard Helly in 1913 that has since led to applications in many areas, from data mining, computer vision and voting. Free. 8 p.m. in the Smith 900 Room of the Alvarez College Union. For more information call 704-894-2315.