Robert James Plemmons, a distinguished American mathematician renowned for his pioneering work in computational mathematics, passed away peacefully at his home in Winston-Salem, North Carolina, on February 6, 2026, at the age of 87. His death followed a long and courageous battle with cancer. Plemmons was an Emeritus Z. Smith Reynolds Professor of Mathematics and Computer Science at Wake Forest University, leaving an indelible mark on his field through extensive research, mentorship, and numerous publications.

Born on December 18, 1938, in Old Fort, North Carolina, Robert Plemmons demonstrated exceptional talent early in life, excelling as a star athlete in both baseball and football. He attended Wake Forest University on a full baseball scholarship, where he set several pitching records and was named the WFU ACC Scholar-Athlete of the Year in 1960-61. After graduating with a Bachelor of Science degree in mathematics in 1961, he pursued a brief professional baseball career with the Baltimore Orioles' minor league clubs before dedicating himself fully to academia. He earned his Ph.D. in Applied Mathematics from Auburn University in 1965.

Dr. Plemmons' illustrious career included research positions at Martin Marietta and the National Security Agency, followed by academic appointments at the University of Mississippi and the University of Tennessee Knoxville. In 1981, he joined North Carolina State University, where he founded the University of North Carolina System's Center for Research in Scientific Computation. He returned to his alma mater, Wake Forest University, in 1990, where he held the prestigious Z. Smith Reynolds Chair. He was recognized as a Fellow of the Society for Industrial and Applied Mathematics (SIAM) for his significant contributions.

Throughout his career, Plemmons authored more than 250 articles and books, including the influential 1979 work "Nonnegative Matrices in the Mathematical Sciences." His research focused on applying computational mathematics to problems in image and signal processing, optics, and photonics, with much of his work supported by the U.S. Department of Defense for over four decades. He also testified before U.S. Congressional Committees on basic research priorities. Even after retiring from teaching in 2013, he remained an active researcher at Wake Forest, contributing to projects on remote sensing and collaborating with scientists globally.

Beyond his academic achievements, Robert Plemmons was known for his humble demeanor, collaborative spirit, and devotion to his family. He cherished his dogs and enjoyed gardening, fishing, running, weightlifting, and birding. A passionate fan of Wake Forest Athletics, he actively supported the university's sports programs. His kindness, generosity, and profound impact on the mathematical community, his students, and colleagues will be deeply missed. A celebration of his life is planned for June 13th at Calvary Baptist Church in Winston-Salem.