Exemple de utilizare a Finitely generated în Engleză și traducerile lor în Română
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Finitely Generated Abelian Groups.
The free group on a finite set is finitely generated by the elements of that set.
The additive group of rational numbers Q is an example of a countable group that is not finitely generated.
A subgroup of a finitely generated group need not be finitely generated.
If G is abelian, nilpotent, solvable,cyclic or finitely generated, then so is G/N.
Subgroups of a finitely generated Abelian group are themselves finitely generated.
A group such that all its subgroups are finitely generated is called Noetherian.
Every infinite finitely generated group must be countable but countable groups need not be finitely generated. .
Another important idea in geometric group theory is to consider finitely generated groups themselves as geometric objects.
The lattice of subgroups of a group satisfies the ascending chain condition if andonly if all subgroups of the group are finitely generated.
A group such that every finitely generated subgroup is finite is called locally finite.
The commutator subgroup of the free group F 2{\displaystyle F_{2}} on two generators is an example of a subgroup of a finitely generated group that is not finitely generated.
Formally, this means classifying finitely generated groups with their word metric up to quasi-isometry.
Every infinite cyclic group is isomorphic to the additive group of the integers Z. A locally cyclic group is a group in which every finitely generated subgroup is cyclic.
By definition, every finite group is finitely generated, since S can be taken to be G itself.
Every quotient of a finitely generated group G is finitely generated; the quotient group is generated by the images of the generators of G under the canonical projection. A subgroup of a finitely generated group need not be finitely generated. .
In 1954, Albert G. Howson showed that the intersection of two finitely generated subgroups of a free group is again finitely generated. .
This conjecture states that any finitely generated multigraded module over the standard graded polynomial ring in several variables admits a Stanley decomposition whose Stanley depth(sdepth) is bounded from below by the depth of the module.
A particularly influential broad theme in the area is Gromov's program[14]of classifying finitely generated groups according to their large scale geometry.
The word problem for a finitely generated group is the decision problem whether two words in the generators of the group represent the same element.
It was spurred by the 1987 monograph of Mikhail Gromov"Hyperbolic groups"[8] that introduced the notion of a hyperbolic group(also known as word-hyperbolic or Gromov-hyperbolic or negatively curved group),which captures the idea of a finitely generated group having large-scale negative curvature, and by his subsequent monograph Asymptotic Invariants of Infinite Groups,[9] that outlined Gromov's program of understanding discrete groups up to quasi-isometry.
The word problem for a given finitely generated group is solvable if and only if the group can be embedded in every algebraically closed group.
Geometric group theory studies the connections between algebraic properties of finitely generated groups and topological and geometric properties of spaces on which these groups act.
The fundamental theorem of finitely generated abelian groups states that a finitely generated Abelian group is the direct sum of a free Abelian group of finite rank and a finite Abelian group, each of which are unique up to isomorphism.
Every Abelian group can be seen as a module over the ring of integers Z, and in a finitely generated Abelian group with generators x1,…, xn, every group element x can be written as a linear combination of these generators.
In algebra, a finitely generated group is a group G that has some finite generating set S so that every element of G can be written as the combination(under the group operation) of finitely many elements of the finite set S and of inverses of such elements.[1].
The study of abeliangroups is quite mature, including the fundamental theorem of finitely generated abelian groups; and reflecting this state of affairs, many group-related notions, such as center and commutator, describe the extent to which a given group is not abelian.
A subgroup of finite index in a finitely generated group is always finitely generated, and the Schreier index formula gives a bound on the number of generators required.[2].
Geometric group theory is an area in mathematics devoted to the study of finitely generated groups via exploring the connections between algebraic properties of such groups and topological and geometric properties of spaces on which these groups act(that is, when the groups in question are realized as geometric symmetries or continuous transformations of some spaces).