Conjugation or conjugate may refer to:
Linguistics Grammatical conjugation, the modification of a verb from its basic form
Emotive conjugation or Russell's conjugation, the use of loaded language
Mathematics Complex conjugation, the change of sign of the imaginary part of a complex number Conjugate (square roots), the change of sign of a square root in an expression Conjugate element (field theory), a generalization of the preceding conjugations to roots of a polynomial of any degree Conjugate transpose, the elementwise complex conjugate of a matrix's transpose In group theory, various notions are called conjugation: Matrix similarity, also called matrix conjugation Conjugation (group theory), the analogous operation in arbitrary groups Conjugacy class, a collection of group elements related by conjugation Inner automorphism, the function that conjugation by a fixed element defines Conjugate closure, the image of a subgroup under the overgroup's inner automorphisms Topological conjugation, which identifies equivalent dynamical systems Conjugate words in combinatorics Harmonic conjugate in complex analysis Convex conjugate, the ("dual") lower-semicontinuous convex function resulting from the Legendre–Fenchel transformation of a "primal" function Conjugate (graph theory), an alternative term for a line graph, i.e. a graph representing the edge adjacencies of another graph Isogonal conjugate, in geometry Conjugate gradient method, an algorithm for the numerical solution of particular systems of linear equations Conjugate points, in differential geometry
Probability and statistics Conjugate prior, in Bayesian statistics, a family of probability distributions that contains a prior and the posterior distributions for a particular likelihood function (particularly for one-parameter exponential families) Conjugate pairing of probability distributions, in the Fourier-analytic theory of characteristic functions and statistical mechanics
Science Sexual conjugation, a type of isogamy in unicellular eukaryotes Bacterial conjugation, a mechanism of exchange of genetic material between bacteria Conjugate (anatomy), a type of pelvic measurement Conjugate vaccine, in immunology Conjugation (biochemistry), covalently linking a biomolecule with another molecule Conjugate (acid-base theory), a system describing a conjugate acid-base pair Conjugated system, a system of atoms covalently bonded with alternating single and multiple bonds Conjugate variables (thermodynamics), pairs of variables that always change simultaneously Conjugate quantities, observables that are linked by the Heisenberg uncertainty principle Conjugate focal plane, in optics Charge conjugation
See also Conjugal (disambiguation) Conjoint