homomorphism

homomorphism

English

Etymology

homo- +‎ morphism.

Noun

homomorphism (plural homomorphisms)

1. (algebra) A structure-preserving map between two algebraic structures of the same type, such as groups, rings, or vector spaces.

   A field homomorphism is a map from one field to another one which is additive, multiplicative, zero-preserving, and unit-preserving.

   • 1954, Kuo-Tsai Chen, Iterated Integrals and Exponential Homomorphisms, Proceedings of the London Mathematical Society, Reprinted in 2001, Philippe Tondeur (editor), Collected Papers of K.-T. Chen, Birkhäuser, page 54,

     This motivates a generalization, and exponential homomorphisms are now defined, in an algebraic fashion, from certain free products to formal power series rings with non-commutative indeterminates.

   • 1997, Glen E. Bredon, Sheaf Theory, 2nd Edition, Springer, page 8,

     A homomorphism of presheaves ${\\displaystyle h:A\\rightarrow B}$ is a collection of homomorphisms ${\\displaystyle h_{U}:A(U)\\rightarrow B(U)}$ commuting with restrictions.

   • 2003, Brian C. Hall, Lie Groups, Lie Algebras, and Representations: An Elementary Introduction, Springer, page 17,

     Definition 1.15. Let ${\\displaystyle G}$ and ${\\displaystyle H}$ be matrix Lie groups. A map ${\\displaystyle \\Phi }$ from ${\\displaystyle G}$ to ${\\displaystyle H}$ is called a Lie group homomorphism if (1) ${\\displaystyle \\Phi }$ is a group homomorphism and (2) ${\\displaystyle \\Phi }$ is continuous.

2. (biology) A similar appearance of two unrelated organisms or structures.

Hyponyms

• (structure-preserving map between algebraic structures): automorphism, endomorphism, epimorphism, isomorphism, linear map, monomorphism

Derived terms

• ring homomorphism
• semigroup homomorphism
• boundary homomorphism

Related terms

• morphism

Translations

notion in mathematics

Arabic: تَشَاكُل‎ m (tašākul) Armenian: հոմոմորֆիզմը (homomorfizmə) Czech: homomorfismus (cs) m Danish: homomorfi c Dutch: homomorfisme (nl) n Finnish: homomorfismi French: homomorphisme (fr) m Georgian: ჰომომორფიზმი (homomorpizmi) German: Homomorphismus (de) m Greek: ομομορφισμός m (omomorfismós) Hungarian: homomorfizmus (hu) Icelandic: mótun f, sammótun f Irish: homamorfacht f Italian: omomorfismo (it) m Lithuanian: homomorfizmas Persian: همریختی‎ (fa) Polish: homomorfizm m Portuguese: homomorfismo m Punjabi: ਹੋਮੋਮੌਰਫਿਜ਼ਮ (homomaurphizam) Russian: гомоморфи́зм (ru) m (gomomorfízm) Serbo-Croatian: homomorfizam (sh) m Slovene: homomorfizem m Swedish: homomorfi (sv) c, homomorfism (sv) c Ukrainian: гомоморфізм m (homomorfizm) Vietnamese: phép đồng cấu (vi)

Further reading

• Group homomorphism on Wikipedia.Wikipedia
• Ring homomorphism on Wikipedia.Wikipedia
• Linear map on Wikipedia.Wikipedia
• Algebra homomorphism on Wikipedia.Wikipedia
• Glossary of field theory#Homomorphisms on Wikipedia.Wikipedia
• Semigroup#Homomorphisms and congruences on Wikipedia.Wikipedia
• Homomorphism on Encyclopedia of Mathematics
• homomorphism on nLab