A branch of mathematics that studies the properties of topological spaces endowed with ℝᵏ-valued functions, with respect to the change of these functions.

(mathematics) A branch of functional analysis, being the study of linear operators on function spaces.

(quantum mechanics) The study of the analytic properties of scattering as a function of angular momentum, where the angular momentum is not restricted to an integer but may take any complex value.

Sigmund Freud's hypothesis, in the mid-1890s, that a repressed memory of an early childhood sexual abuse experience was the essential precondition for hysterical or obsessional symptoms.

The hypothesis that people perceive spoken words by identifying the vocal tract gestures with which they are pronounced rather than by identifying the sound patterns generated by speech.

(mathematics, number theory) The field of study dealing with computational methods for investigating and solving problems in number theory and arithmetic geometry.

Synonym of computational number theory.

(physics) A model (not believed to be literally true) developed by physicists Theodor Kaluza and Oskar Klein that attempted to combine gravity and electromagnetism by adding a fifth dimension to our four-dimensional spacetime.

(finance) A theory of asset pricing serving as a framework for the arbitrage pricing model.

(linguistics) A theory that posits a common syntactic structure for different lexical categories. Each phrase (XP) is the projection of a head (X) and may optionally include a specifier (sister of X-bar, daughter of XP), adjuncts (sister and daughter of X-bar) and complements (sister of X, daughter of X-bar).