Klein
Klein is a term with various meanings in different fields. In the context of mathematics, it is often associated with the German mathematician Felix Klein, who made significant contributions to the field of geometry. In the medical field, Klein can refer to a number of different concepts, including the Klein bottle, a one-sided surface which, if traveled upon, could be followed back to the point of origin while flipping the traveler upside down.
Mathematics[edit | edit source]
In mathematics, the term Klein is often associated with the Klein bottle, a non-orientable surface, informally, a surface (a two-dimensional manifold) with no identifiable "inner" and "outer" sides. Other mathematical concepts named after Felix Klein include the Klein four-group and the Klein-Gordon equation.
Medicine[edit | edit source]
In medicine, the term Klein can refer to a number of different concepts. For example, the Klein-Waardenburg syndrome is a genetic disorder that affects the color of a person's eyes, skin, and hair. The Klein-Levin syndrome, on the other hand, is a rare sleep disorder that primarily affects adolescent males.
Psychology[edit | edit source]
In psychology, the term Klein is associated with Melanie Klein, a pioneering child psychoanalyst. The Kleinian theory is named after her and focuses on the early developmental processes.
See also[edit | edit source]
- Felix Klein
- Klein bottle
- Klein four-group
- Klein-Gordon equation
- Klein-Waardenburg syndrome
- Klein-Levin syndrome
- Melanie Klein
- Kleinian theory
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Contributors: Prab R. Tumpati, MD