Mary Cartwright, English mathematician and academic, one of the first people to analyze a dynamical system with chaos (d. 1998)
Dame Mary Lucy Cartwright, (17 December 1900 – 3 April 1998) was a British mathematician. She was one of the pioneers of what would later become known as chaos theory. Along with J. E. Littlewood, Cartwright saw many solutions to a problem which would later be seen as an example of the butterfly effect.