- surgery theory
- мат.теория перестройки
English-Russian scientific dictionary. 2008.
surgery theory
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Surgery theory — In mathematics, specifically in geometric topology, surgery theory is a collection of techniques used to produce one manifold from another in a controlled way, introduced by Milnor (1961). Surgery refers to cutting out parts of the manifold… … Wikipedia
Surgery (disambiguation) — Surgery is a medical specialty that uses operative treatment. It also refers to the place where surgery is performed, or the offices of the practitioner, the surgeon.Surgery may also mean:In medicine: * In American English, a surgical procedure… … Wikipedia
surgery — /serr jeuh ree/, n., pl. surgeries for 3 5. 1. the art, practice, or work of treating diseases, injuries, or deformities by manual or operative procedures. 2. the branch of medicine concerned with such treatment. 3. treatment, as an operation,… … Universalium
Obstruction theory — In mathematics, obstruction theory is a name given to two different mathematical theories, both of which yield cohomological invariants. Contents 1 In homotopy theory 2 In geometric topology 3 In surgery theory … Wikipedia
L-theory — Algebraic L theory is the K theory of quadratic forms; the term was coined by C. T. C. Wall, with L being used as the letter after K . Algebraic L theory (also known as hermitian K theory )is very important in surgery theory. DefinitionOne can… … Wikipedia
Algebraic K-theory — In mathematics, algebraic K theory is an important part of homological algebra concerned with defining and applying a sequence Kn(R) of functors from rings to abelian groups, for all integers n. For historical reasons, the lower K groups K0 and… … Wikipedia
Dehn surgery — In topology, a branch of mathematics, a Dehn surgery, named after Max Dehn, is a specific construction used to modify 3 manifolds. The process takes as input a 3 manifold together with a link. Dehn surgery can be thought of as a two stage process … Wikipedia
K-theory — In mathematics, K theory is a tool used in several disciplines. In algebraic topology, it is an extraordinary cohomology theory known as topological K theory. In algebra and algebraic geometry, it is referred to as algebraic K theory. It also has … Wikipedia
History of surgery — Surgery is the branch of medicine that deals with the physical manipulation of a bodily structure in order to diagnosis, prevent or cure an ailment. Ambroise Paré, a 16th century French surgeon stated that there were five reasons to perform… … Wikipedia
Migraine surgery — is any surgical operation undertaken with the goal of reducing or preventing migraines. Innovative surgical techniques have been developed to help patients with migraine headaches. Migraines affect an estimated 10% of the worldwide population… … Wikipedia
Small cancellation theory — In the mathematical subject of group theory, small cancellation theory studies groups given by group presentations satisfying small cancellation conditions, that is where defining relations have small overlaps with each other. It turns out that… … Wikipedia
