Teresa Cohen
Encyclopedia
Teresa Cohen was an American mathematician. She was born in Baltimore
Baltimore
Baltimore is the largest independent city in the United States and the largest city and cultural center of the US state of Maryland. The city is located in central Maryland along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Baltimore is sometimes referred to as Baltimore...

, Maryland
Maryland
Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

. She attended the Friends School in Baltimore whose teachers she credited with her interest in mathematics
Mathematics
Mathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proofs, which are arguments sufficient to convince other mathematicians of their validity...

 and teaching. She earned her bachelor of arts degree in mathematics and physics at Goucher College in 1912. She earned her PhD in 1918 at John Hopkins university.
She became a professor in 1945, one of only a handful of women to have full professor status. Due to university regulations she officially retired in 1961 but tutored maths students for free until 1985 at the age of 94, when an accident forced her to move into a Baltimore nursing home.
Teresa Cohen died in Baltimore in 1992 at the age of 100. She had been a member of the American Mathematical Society, the Mathematical Association of America, Pi Mu Epsilon, and Sigma Delta Epsilon, the national honour society for women in science.

The papers she published included four papers on investigations of the plane quartic, and a co-authored paper with William Knight about the convergence and divergence of the p-series


in which they gave proofs that could be understood by persons not familiar with the integral test for convergence of a series.
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