Look up Conjugation in
Wiktionary, the free dictionary.

Conjugal redirects here. For the type of prison visit, see conjugal visit.

Conjugation may refer to:

• Grammatical conjugation, the modification of a verb from its basic form, including:
  • Latin conjugation
  • Spanish conjugation
  • English verb
• Marriage, relationship between two or more individuals.

In mathematics:

• Complex conjugation, the operation which multiplies the imaginary part of a complex number by −1;
• conjugate element (field theory), a generalization of complex conjugation
• The conjugate transpose of a matrix with complex entries is created by taking the transpose of the matrix and the complex conjugate of each entry.
• Conjugate (algebra), used to rationalize the denominator of a fraction.
• In group theory, various notions are called conjugation:
  • inner automorphism, a type of conjugation homomorphism
  • conjugacy class, the image of an element under the conjugation homomorphisms
  • conjugate closure, the image of a subgroup under the conjugation homomorphisms
  • conjugation of isometries in Euclidean space, an explicit description of the images of elements under conjugation in a special case
• Topological conjugation, which identifies equivalent dynamical systems.
• Conjugate points, in differential geometry.
• Conjugate prior, in probability theory, a family of prior probability distributions.
• Convex conjugate, generalization of the Legendre transformation. Also known as Legendre-Fenchel transformation or Fenchel transformation.

In the biosciences:

• bacterial conjugation, transfer of DNA without fusion
• conjugate vaccine, in immunology

In chemistry:

• Brønsted-Lowry acid-base theory, describes a conjugate acid-base pair
• conjugated system, in organic chemistry, a system of atoms covalently bonded with alternating single and multiple bonds.

In physics:

• Conjugate variables (thermodynamics), the internal energy of a system.
• Conjugate quantities, in quantum physics, are observables that are linked by the Heisenberg uncertainty principle, such as position and momentum.

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.