automorphism group

noun

The group of automorphisms of a given set or other mathematical object, with the group operation being function composition.

“The automorphism group of a set is the set's symmetric group.”

Meanings

nounautomorphism group (plural automorphism groups)

plural automorphism groups

  1. group theoryThe group of automorphisms of a given set or other mathematical object, with the group operation being function composition.

    The automorphism group of a set is the set's symmetric group.

    4 more examples

    The automorphism group of a finite-dimensional vector space (respectively, projective space) is the space's general linear group (respectively, projective linear group).

    Moreover, we think that this approach to the automorphism groups of Banach space domains may also serve as motivating and illustrative material in introducing students to the theory of Lie groups and complex manifolds.

    1984, José M. Isidro, László L. Stachó, Holomorphic Automorphism Groups in Banach Spaces: An Elementary Introduction, Elsevier (North-Holland), page vi

    Recently Droste, Holland and Macpherson in [DHM1], [DHM2] and [DHM3] investigated various questions concerning the automorphism groups of homogeneous #92;aleph#95;0-categorical trees.

    1993, Matatyahu Rubin, The Reconstruction of Trees from Their Automorphism Groups, American Mathematical Society, page 5

    Unlike the classical integration theory, the non-commutative theory comes with the intrinsic dynamics of the modular automorphism group. This chapter is devoted to the elementary theory of the modular automorphism groups.

    2002, Masamichi Takesaki, Theory of Operator Algebras II, Springer, page 91

    Synonyms: symmetry group, symmetric group

Synonyms & antonyms

nounThe group of automorphisms of a given set or other mathematical object, with the group operation being function composition.

Translations

Polish grupa automorfizmów
  • grupa automorfizmówgroup whose elements are the automorphisms of a given mathematical object
Cite this entry
APA

automorphism group. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/automorphism%20group

MLA

“automorphism group.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/automorphism%20group. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “automorphism group,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/automorphism%20group.

Source: automorphism group on Wiktionary, CC BY-SA 4.0.