In mathematical
finite group theory
Finite is the opposite of infinite. It may refer to:
* Finite number (disambiguation)
* Finite set, a set whose cardinality (number of elements) is some natural number
* Finite verb, a verb form that has a subject, usually being inflected or marked ...
, the Thompson subgroup
of a finite ''p''-group ''P'' refers to one of several
characteristic subgroup
In mathematics, particularly in the area of abstract algebra known as group theory, a characteristic subgroup is a subgroup that is mapped to itself by every automorphism of the parent group. Because every conjugation map is an inner automorphism ...
s of ''P''. originally defined
to be the subgroup generated by the
abelian subgroups of ''P'' of maximal
rank
Rank is the relative position, value, worth, complexity, power, importance, authority, level, etc. of a person or object within a ranking, such as:
Level or position in a hierarchical organization
* Academic rank
* Diplomatic rank
* Hierarchy
* H ...
. More often the Thompson subgroup
is defined to be the subgroup generated by the abelian subgroups of ''P'' of maximal order or the subgroup generated by the elementary abelian subgroups of ''P'' of maximal rank. In general these three subgroups can be different, though they are all called the Thompson subgroup and denoted by
.
See also
*
Glauberman normal p-complement theorem In mathematical group theory, a normal p-complement of a finite group for a prime ''p'' is a normal subgroup of order coprime to ''p'' and index a power of ''p''. In other words the group is a semidirect product of the normal ''p''-complement and an ...
*
ZJ theorem In mathematics, George Glauberman's ZJ theorem states that if a finite group ''G'' is ''p''-constrained and ''p''-stable and has a normal ''p''-subgroup for some odd prime ''p'', then ''O'p''′(''G'')''Z''(''J''(''S'')) is a normal subgroup ...
*
Puig subgroup
In mathematical finite group theory, the Puig subgroup, introduced by , is a characteristic subgroup of a ''p''-group analogous to the Thompson subgroup
In mathematical finite group theory, the Thompson subgroup J(P) of a finite ''p''-group ''P'' ...
, a subgroup analogous to the Thompson subgroup
References
*
*
*{{Citation , last1=Thompson , first1=John G. , author1-link=John G. Thompson , title=A replacement theorem for p-groups and a conjecture , doi=10.1016/0021-8693(69)90068-4 , mr=0245683 , year=1969 , journal=
Journal of Algebra
''Journal of Algebra'' (ISSN 0021-8693) is an international mathematical research journal in algebra. An imprint of Academic Press, it is published by Elsevier. ''Journal of Algebra'' was founded by Graham Higman, who was its editor from 1964 to 1 ...
, issn=0021-8693 , volume=13 , pages=149–151, doi-access=free
Finite groups