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| education = [[Indiana State University]] ([[Bachelor of Science|BS]]) <br> [[University of Illinois Urbana-Champaign]] ([[Master of Science|MS]], [[Doctor of Philosophy|PhD]]) |
| education = [[Indiana State University]] ([[Bachelor of Science|BS]]) <br> [[University of Illinois Urbana-Champaign]] ([[Master of Science|MS]], [[Doctor of Philosophy|PhD]]) |
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Latest revision as of 02:40, 14 January 2026
American mathematician
Charles Emery Roberts, Jr (October 9, 1942 – March 26, 2023) was an American mathematician.[1]
Early life and education
[edit]
Roberts was born in 1942 in Washington, D.C. to Evelyn and Charles Roberts, Sr. He attended North Posey High School and graduated as valedictorian in 1960. He studied mathematics at Indiana State University, where he graduated summa cum laude in 1964 before attending the University of Illinois Urbana-Champaign, where he earned a master’s in 1965. He studied under Geneva G. Belford and produced a thesis on the integral curves of differential equations, earning a doctorate in 1968.[2]
After graduating from the University of Illinois, Roberts began working with Pan-American Airlines in Cape Canaveral, Florida from 1968 to 1970. He wrote satellite tracking programs in conjunction with NASA during the Apollo missions, including Apollo 11.
In 1971, he returned to Indiana State and became a professor of mathematics. Roberts wrote multiple textbooks on mathematical proofs and differential equations. In 1971, he published a modified version of the Jacchia Reference Atmosphere, called the Jacchia-Roberts Density Model, used in aerospace applications to model satellite orbits and atmospheric entry trajectories.[3] He also published papers on celestial mechanics and developed methods for using power series to generate trajectories for orbital and suborbital vehicles.[4] His mathematics research also dealt with Hamnmerstein operators[5] and combinatorial theory.[6] Roberts received the Theodore Dreiser Distinguished Research Award in 2010. He retired in 2017.
Roberts died in 2023 in Naperville, Illinois, aged 80.
He married Imogene Roberts on August 25, 1963. They were married for 59 years until her death two weeks before his own. According to his wishes, his body was donated to the Anatomical Gift Association of Chicago.
- ^ “Theodore Dreiser Distinguished Research/Creativity Awards presented | Newsroom | Indiana State University”. news.indianastate.edu. Indiana State University. April 29, 2010. Retrieved January 14, 2026.
- ^ “Doctoral Graduates | Department of Mathematics | Illinois”. math.illinois.edu. Retrieved January 14, 2026.
- ^ Roberts, Charles E. (December 1, 1971). “An analytic model for upper atmosphere densities based upon Jacchia’s 1970 models”. Celestial mechanics. 4 (3): 368–377. doi:10.1007/BF01231398. ISSN 1572-9478. Retrieved January 14, 2026.
- ^ Roberts, Charles E. (December 1, 1975). “Comments on the application of power series solutions to problems in celestial mechanics”. Celestial mechanics. 12 (4): 397–407. doi:10.1007/BF01595387. ISSN 1572-9478. Retrieved January 14, 2026.
- ^ de Korvin, Andre; Roberts, Charles E. (December 1, 1980). “Double adjoints of Hammerstein functionals defined on continuous functions”. Annali di Matematica Pura ed Applicata. 126 (1): 93–102. doi:10.1007/BF01762502. ISSN 1618-1891. Retrieved January 14, 2026.
- ^ Roberts, Charles E (September 1, 1992). “Sets of mutually orthogonal Latin squares with “like subsquares”“. Journal of Combinatorial Theory, Series A. 61 (1): 50–63. doi:10.1016/0097-3165(92)90052-V. ISSN 0097-3165. Retrieved January 14, 2026.
