projective object
41Ellipse — Elliptical redirects here. For the exercise machine, see Elliptical trainer. This article is about the geometric figure. For other uses, see Ellipse (disambiguation). Not to be confused with ellipsis. An ellipse obtained as the intersection of a… …
42Representation theory — This article is about the theory of representations of algebraic structures by linear transformations and matrices. For the more general notion of representations throughout mathematics, see representation (mathematics). Representation theory is… …
43Manifold — For other uses, see Manifold (disambiguation). The sphere (surface of a ball) is a two dimensional manifold since it can be represented by a collection of two dimensional maps. In mathematics (specifically in differential geometry and topology),… …
44Otto F. Kernberg — Born 1928 Vienna, Austria …
45Michael Atiyah — Sir Michael Atiyah Born 22 April 1929 (1929 04 22) (age 82) …
46Limit (category theory) — In category theory, a branch of mathematics, the abstract notion of a limit captures the essential properties of universal constructions such as products and inverse limits. The dual notion of a colimit generalizes constructions such as disjoint… …
47Defence mechanism — For the biological concept, see Antipredator adaptation. Part of a series of articles on Psychoanalysis …
48Donald Meltzer — (1922–2004) was a Kleinian psychoanalyst whose teaching made him influential in many countries. He became known for making clinical headway with difficult childhood conditions such as autism, and also for his theoretical innovations and… …
49Lift (mathematics) — f from an object X to an object Y , and a morphism g from an object Z to Y , a lift (or lifting) of f to Z is a morphism h from X to Z such that gh = f . A basic example in topology is lifting a path in one space to a path in a covering space.… …
50Field with one element — In mathematics, the field with one element is a suggestive name for an object that should exist: many objects in math have properties analogous to objects over a field with q elements, where q = 1, and the analogy between number fields and… …
