Torsion   (translated from Spanish)
Torsion In matemáticas , torsion it has several meaning, in general without ... In geometría differential elementary in three dimensions, torsion of one curve it measures how shrewdly ... function to values vectoriales r(t), the torsion in a given value of t is ... × r''|| -2 . A second meaning of torsion in geometry differential it is torsion ...
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Whitehead torsion
Whitehead torsion In mathematics, Whitehead torsion is an invariant of an h-cobordism in a Whitehead group, that is important in simple homotopy theory ... named for J. H. C. Whitehead. Whitehead torsion Suppose that W is an h-cobordism ... to both M and N. The Whitehead torsion of the cobordism W is an ...
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Torsion subgroup
Torsion subgroup In group theory, the torsion subgroup of an abelian group A is the subgroup of A consisting ... elements that have finite order. The abelian group A is called torsion-free if ...
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Torsion (algebra)   (translated from German)
Torsion (algebra) Torsion is that Phenomenon of commutative algebra, thus ... simpler) the theory that Vector spaces differentiates. Torsion is related to the term of the ... Definitions In the simplest form is in Torsion element nothing different one than an element more finally Order in one Group or one Monoid , thus an element ...
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Abelian group
Abelian group In mathematics, an abelian group, also called a commutative group, is a group (G, *) such that a * b = b * a ... notation is usually used. Examples Every cyclic group G is abelian, because if x, ...
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Circle group
Circle group In mathematics, the circle group, denoted by T (or in blackboard bold ... math>\mathbb T), is the multiplicative group of all complex numbers with absolute value ... mathbb C : |z| = 1 \}. The circle group forms a subgroup of C � , the multiplicative group of all nonzero complex numbers. Since ...
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Divisible group
Divisible group In group theory, a divisible group is an abelian group G such that for any positive integer ... Examples Q is divisible, as additive abelian group More generally, every vector space over ...
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Whitehead group
Whitehead group Whitehead group in mathematics may mean: A group W with Ext(W, Z)=0; see Whitehead problem The Whitehead group Wh(G) of a group G, equal to K 1 (Z[ ...
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Nilpotent group
Nilpotent group In group theory, a nilpotent group is a group having a special property that makes it ... lower (or descending) central series of a group G as a series of groups ...
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Group theory
Group theory Group theory is that branch of mathematics concerned ... groups. Please refer to the Glossary of group theory for the definitions of terms used throughout group theory. See also list of group theory topics. History There are three ...
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