Nonlocal
# Nonlocal

Nonlocal may refer to:

* Action at a distance, direct interaction of physical objects that are not in proximity
* Conjugated system (or nonlocalized bond), in chemistry, a conjugated system is a system of connected p-orbitals with delocalized electrons in compounds with alternating single and multiple bonds, which in general may lower the overall energy of the molecule and increase stability
* Nonlocal goto, an abstract representation of the control state of a computer program
* Nonlocal Lagrangian, in field theory, a type of functional ${\mathcal {L}}\phi (x)$ which contains terms which are nonlocal in the fields i.e. which are not polynomials or functions of the fields or their derivatives evaluated at a single point in the space of dynamical parameters (e.g. space-time)
   * Other nonlocal relationships in physics, such as Pippard's nonlocal generalisation of the Londons' equations for superconductivity
* Non-local means, an algorithm in image processing for image denoising
* Non-local variable, in programming language theory, a variable that is not defined in the local scope
   * nonlocal, a statement in Python 3 that causes identifiers to refer to their bindings in outer enclosing scopes
