(physics) A theory developed in the early 20th century, according to which nuclear and radiation phenomena can be explained by assuming that energy only occurs in discrete amounts called quanta.

(philosophy) Theory in medieval Europe to explain then-modern events from an Aristotelian context.

An interdisciplinary branch of engineering and mathematics, dealing with the control of the behavior of dynamical systems.

(mathematics) The study of iterative non-linear systems in which arbitrarily small variations in initial conditions become magnified over time.

(mathematics) A branch of topology dealing with knots.

(mathematics) The branch of pure mathematics concerned with the properties of integers.

An overall explanation of phenomena in a particular discipline or realm of experience such as economics, sociology, or history.

The branch of mathematics dealing with the algebraic structure of fields. / (psychology) A theory which examines patterns of interaction between individuals and their environment.

(mathematics) The branch of mathematics dealing with the art of transmitting messages reliably over a noisy channel by adding redundancy to the message.

The branch of abstract algebra dealing with group characters.