Conjugation may refer to:

• Grammatical conjugation, the modification of runnign a verb from its basic form
  • Latin conjugation, Spanish conjugation and The English verb, each with complex conjugation forms
• Marriage, relationship between two individuals

In mathematics: In linguistics, conjugation is the creation of derived forms of a verb from its principal parts by inflection (regular alteration according to rules of grammar). ... It has been suggested that this article or section be merged into Latin grammar. ... Main article: Spanish verbs This is a paradigm of Spanish verbs, that is, a set of conjugation tables, for the model regular verbs and for some of the most common irregular verbs (see the article on Spanish irregular verbs for common patterns of irregularity that may help understanding this paradigm). ... A typical English verb has five principal parts: In English, only strong verbs like write may have all five distinct parts; in weak verbs, the preterite and past participle are identical, e. ... The examples and perspective in this article or section may not represent a worldwide view. ...

• Complex conjugation, the operation which multiplies the imaginary part of a complex number by -1; see also conjugate element (field theory)
• if a is an element of a group, then the map f(x) = axa^-1 is called conjugation by a. See inner automorphism, conjugacy class, conjugate closure, and conjugation of isometries in Euclidean space
• Conjugate points, in differential geometry
• Conjugate prior, in probability theory, a family of prior probability distributions

In science: In mathematics, the complex conjugate of a complex number is given by changing the sign of the imaginary part. ... In mathematics, in particular field theory, the conjugate elements of an algebraic element α, over a field K, are the (other) roots of the minimal polynomial PK,α(t) of α over K. If K is given inside an algebraically closed field C, then the conjugates can be taken inside... In abstract algebra, an inner automorphism of a group is a function f : G -> G defined by f(x) = axa-1 for all x in G; where the conjugation is often denoted exponentially by ax. ... In mathematics, especially group theory, the elements of any group may be partitioned into conjugacy classes; members of the same conjugacy class share many properties, and study of conjugacy classes of non-abelian groups reveals many important features of their structure. ... In group theory, the conjugate closure of a subset S of a group G is the subgroup of G which is generated by the elements of S and their conjugates SG = {x ∈ G | there exists g ∈ G and s ∈ S such that x = g−1sg}, The conjugate closure of S... In a group, the conjugate by g of h is ghg-1. ... This is a glossary of some terms used in Riemannian geometry and metric geometry — it doesnt cover the terminology of differential topology. ... In Bayesian probability theory, a conjugate prior is a family of prior probability distributions which has the property that the posterior probability distribution also belongs to that family. ...

• Bacterial conjugation, in biology, transmission of DNA between cells by contact other than fusion
• Conjugated system, in organic chemistry, a system of atoms covalently bonded
• Conjugate variables (thermodynamics), the internal energy of a system
• In metabolism, conjugation is a biochemical process to bind a substance to an acid and thereby deactivating its biological activity, making it water-soluble, and facilitating its excretion
• In quantum physics, two quantities are conjugates when they are linked by the Heisenberg uncertainty principle, such as position and momentum, or energy and duration.