KNOWPIA
WELCOME TO KNOWPIA

**Charles Frederick Wells** (4 May 1937 in Atlanta, Georgia – 17 June 2017)^{[1]}^{[2]} was an American mathematician known for his fundamental contributions to category theory. He was Professor Emeritus of Mathematics at Case Western Reserve University.^{[3]}

Wells taught there for about 35 years, with sabbatical interruptions at ETH Zürich (in mathematics) and Oxford University (in computing science). He had a research career in mathematics in finite fields, group theory and category theory. In the last twenty years of this life he had also been interested in the language of mathematics and related issues concerning teaching and communicating abstract ideas.

In addition to his scholarly publications, Wells produced *A Handbook of Mathematical Discourse,*^{[4]}^{[5]} which is a dictionary of words and concepts used by mathematicians that are easily misunderstood, explained in a way that laypersons can also appreciate.

As a life-long shape note singer, in 2002 Wells jointly compiled a tunebook called *Oberlin Harmony,*^{[6]} which included some of his own compositions.

- Barr, Michael; Wells, Charles (1985), "Toposes, Triples and Theories" (PDF),
*Grundlehren der mathematischen Wissenschaften*, vol. 278, Springer-Verlag, ISBN 0-387-96115-1.^{[7]}^{[8]} - Michael Barr and Charles Wells:
*Category Theory for Computing Science*(1999). - Wells, Charles (2003),
*A Handbook of Mathematical Discourse*, Infinity Publishing, ISBN 0-7414-1685-9.

- Wells, Charles (1974), "Polynomials over finite fields which commute with translations",
*Proceedings of the American Mathematical Society*,**46**(3): 347–350, doi:10.1090/S0002-9939-1974-0347785-5

- Sketches (1993) – a survey of the literature on sketches

**^**Birth and Career Data from*American Men and Women of Science*, Thomson Gale 2004**^**†**^**"Home page at CWRU". Archived from the original on 2016-12-31. Retrieved 2012-02-15.**^**Negative review: Krantz, Steven G. (September 2004), "Book Review: A Handbook of Mathematical Discourse" (PDF),*Notices of the American Mathematical Society*,**51**(8): 897–898**^**Positive review: Selden, Annie (February 27, 2014), "MAA Review: A Handbook of Mathematical Discourse",*Mathematical Association of America Reviews***^**Charles Wells, Chloe Maher,*Oberlin Harmony*(2002, Oberlin, Ohio). Incomplete table of contents given in: "Oberlin Harmony".*Hymnary.org*. Retrieved 18 January 2020.**^**Pitts, A. (1991), "Review of Toposes, Triples and Theories by Barr, M., & Wells, C.",*Journal of Symbolic Logic*,**56**(1): 340–341, doi:10.2307/2274934, JSTOR 2274934**^**Rota, Gian-Carlo (1986), "Toposes, Triples and Theories: M. Barr and C. Wells, Springer, 1985, 345 pp.",*Advances in Mathematics*,**61**(2): 184, doi:10.1016/0001-8708(86)90076-9

- "Charles Wells". CWRU. Archived from the original on 2016-12-31. Retrieved 2012-02-15.
- Gyre & Gimble – blog on the language of math, category theory, and teaching abstract ideas
- Abstract Math – for university-level math students