Ruth Stokes | |
---|---|

Born | October 12, 1890 |

Died | August 27, 1968 | (aged 77)

Education | Winthrop Normal and Industrial College (Bachelor's), Vanderbilt University (Master's), Duke University (Ph.D.) |

Known for | mathematician, cryptologist, and astronomer |

**Ruth Wyckliffe Stokes** (October 12, 1890 or 1891 – August 27, 1968) was an American mathematician, cryptologist, and astronomer. She earned the first doctorate in mathematics from
Duke University, made pioneering contributions to the theory of
linear programming, and founded the
Pi Mu Epsilon journal.

Stokes was born on October 12, 1890 or 1891^{
[1]} in
Mountville, South Carolina, one of six children of William Henry Stokes, a physician and farmer, and his wife Francis Emily Fuller Stokes. She earned a bachelor's degree in 1911 from the Winthrop Normal and Industrial College, a women's college that later became
Winthrop University, and began working as a high school mathematics teacher. She was principal of a school in
Rock Hill, South Carolina, from 1913 to 1916, and head of mathematics at
Synodical College in
Fulton, Missouri, from 1916 to 1917.^{
[2]}^{
[3]} She subsequently held two more teaching positions in South Carolina. During this time she also studied mathematics by correspondence through
Columbia University, the
University of Virginia, and the
University of Chicago.^{
[3]}

She returned to graduate study in 1922 at
Vanderbilt University, where she earned a master's degree in mathematics in 1923 with a thesis in the
history of mathematics on the
fundamental theorem of algebra. She became an instructor at Winthrop College, and began taking summer classes at the
University of Wisconsin–Madison, entering more formal doctoral study at
Duke University in 1928.^{
[2]}^{
[3]} She completed her Ph.D. in 1931, supervised by
Joseph Miller Thomas,^{
[4]} becoming the first person to earn a doctorate in mathematics at Duke.^{
[2]} Her dissertation, *A Geometric Theory of Solution of Linear Inequalities*, represented pioneering work in
linear programming, following on from the work of
Lloyd Dines and
Hermann Minkowski.^{
[5]}

Stokes expected her position at Winthrop to be waiting for her on the completion of her doctorate, but
David Bancroft Johnson, the president of Winthrop with whom she had made this agreement, died in 1928 and the next president did not hold to the agreement.^{
[3]} After continuing at Duke as an instructor for a year, Stokes became a mathematics instructor at North Texas State Teachers College (now the
University of North Texas) from 1932 until 1935, when she became head of mathematics at
Mitchell College in
Statesville, North Carolina.^{
[2]}

In 1936, Stokes returned once more to Winthrop College where she became a professor of astronomy and mathematics and, later, the head of mathematics. Her astronomical work included an excursion to Florida to observe the
solar eclipse of April 7, 1940. As a response to
World War II, in 1942, she instituted a program in
cryptology, and began teaching navigation and astronomy to pilots in the
United States Army Air Corps. During this period at Winthrop she also chaired the Southeastern Section of the
Mathematical Association of America and was president of the section for mathematics of the South Carolina Education Association.^{
[2]}^{
[3]}

Stokes had increasingly found herself in dispute with the Winthrop College administration, and in 1946 she moved to
Syracuse University as an assistant professor of mathematics and education, promoted to associate professor in 1953. There, she became founding editor of the
Pi Mu Epsilon journal in 1949. She also participated in the
International Congress of Mathematicians in 1950, exhibiting a collection of mathematical models. She retired from Syracuse as associate professor emerita in 1959, continuing to teach for one more year as an associate professor at
Longwood College in
Farmville, Virginia.^{
[2]}^{
[3]}

After retirement, Stokes returned to Mountville, South Carolina. She died on August 27, 1968.^{
[2]}^{
[3]}

Stokes was named a Fellow of the
American Association for the Advancement of Science in 1950.^{
[6]}

**^**Lee gives her birth year as 1891; Green and LaDuke note conflicting sources for the year but conclude that 1890 is more likely.- ^
^{a}^{b}^{c}^{d}^{e}^{f}^{g}Lee, Susanna O. (2016), "Chapter 21: Dr. Ruth W. Stokes",*From Winthrop to Washington*, Winthrop College - ^
^{a}^{b}^{c}^{d}^{e}^{f}^{g}Green, Judy; LaDuke, Jeanne (2008),*Pioneering Women in American Mathematics: The Pre-1940 PhD's*, History of Mathematics, vol. 34 (1st ed.), American Mathematical Society, The London Mathematical Society, pp. 294–295, ISBN 978-0-8218-4376-5; see also extended biography on pp. 578–579 of the Supplementary Material at the AMS web site for the book. **^**Ruth Stokes at the Mathematics Genealogy Project**^**Kjeldsen, Tinne Hoff (2002), "Different motivations and goals in the historical development of the theory of systems of linear inequalities",*Archive for History of Exact Sciences*,**56**(6): 469–538, doi: 10.1007/s004070200057, JSTOR 41134152, MR 1940044, S2CID 38713659; see in particular pp. 509–510.**^***Historic Fellows*, American Association for the Advancement of Science, retrieved 2021-04-19

Categories:

- 1890s births
- 1968 deaths
- People from Laurens County, South Carolina
- 20th-century American mathematicians
- American women mathematicians
- American astronomers
- American women astronomers
- American cryptographers
- Winthrop University alumni
- Vanderbilt University alumni
- Winthrop University faculty
- University of North Texas faculty
- Syracuse University faculty
- Fellows of the American Association for the Advancement of Science