(sociology) Any theory that is based on observation of social phenomena

(mathematics) The study of the behaviour of queues, and of stochastic processes modelled on them.

(physics) A type of field theory in which the Lagrangian is invariant under a continuous group of local transformations.

A postmodern approach to analysing intersubjective discourses, based on the ways that authority is rooted in individuals' knowledge and perspectives, and the power that such authority exerts.

(mathematics, algebra) A branch of mathematics that studies abstract algebraic structures by representing their elements as linear transformations of vector spaces, and studies modules over these abstract algebraic structures.

(physics) A discredited scientific theory, once considered an alternative to special relativity, proposing that light is emitted at speed c relative to its source instead of applying the invariance postulate.

(LGBT) A field of critical theory that emerged in the early 1990s out of LGBT studies and feminist studies, a kind of interpretation devoted to queer readings of texts.

(economics) The idea that the burdens of taxation "stick" to those taxed directly instead of spreading through the economy.

gender studies

The theory that employees are inherently lazy and irresponsible and will tend to avoid work unless closely supervised and given incentives.