David Jay Eyre passed away peacefully on Wednesday, October 14, 2026, at his home in Torrey, Utah, following a battle with parathyroid cancer. According to an obituary published October 28, the mathematician and former biotech executive was 65 years old.
Born on January 24, 1961, in Logan, Utah, to Harmon and Julie Sears Eyre, David Eyre spent much of his life along the Wasatch Front. He was a scholar who earned a BS in chemistry (1985), an MS in applied mathematics (1990), and a PhD in mathematics (1992) from the University of Utah. After completing a postdoctoral fellowship at the University of Minnesota, he joined the University of Utah Department of Mathematics as faculty in 1995.
Eyre was recognized for his mathematical work on the Cahn-Hilliard equation, also known as Eyre's Theorem, which is a fourth-order nonlinear parabolic partial differential equation used to study how solid materials flow. He developed a time-marching method that provided unconditionally stable solutions for the equation. In 2001, he transitioned to the biotechnology industry, serving as the Director of Biomathematics and Software Engineering for Idaho Technologies, Inc., which later became BioFire Diagnostics, Inc. He eventually served as the company's CIO before retiring in 2020.
An avid outdoorsman, Eyre was a raft guide, sailor, and backcountry skier. He was known for riding his bike from Salt Lake City to Yellowstone National Park and back in the early 1980s. In his later years, he lived in Torrey, Utah, where he was an active member of the local science and technology community and a regular attendee of the Royal Society of Torrey seminars.
David Eyre is survived by his wife, Gena Edvalson; his children, Hannah and William; his mother, Julie; his brother, Richard; and his nephews, Logan and Miles. He was preceded in death by his father, Harmon; his brother, Brian; and his sister, Suzanne. Memories and condolences may be shared at www.allenmortuaries.com.
