Connectivity may refer to:

Computing and technology

Connectivity (media) Connectivity refers broadly to social connections forged through mediated communications systems. That is, 'since the arrival of the World Wide Web and the spread of mobile communications, mediated connectivity has been quietly normalized as central ...

, the ability of the social media to accumulate economic capital from the users connections and activities *

Internet connectivity Internet access is the ability of individuals and organizations to connect to the Internet using computer terminals, computers, and other devices; and to access services such as email and the World Wide Web. Internet access is sold by Internet ...

, the means by which individual terminals, computers, mobile devices, and local area networks connect to the global Internet *

Pixel connectivity In image processing, pixel connectivity is the way in which pixels in 2-dimensional (or hypervoxels in n-dimensional) images relate to their neighbors. Formulation In order to specify a set of connectivities, the dimension N and the width ...

, the way in which pixels in 2-dimensional images relate to their neighbors.

Mathematics

Connectivity (graph theory) In mathematics and computer science, connectivity is one of the basic concepts of graph theory: it asks for the minimum number of elements (nodes or edges) that need to be removed to separate the remaining nodes into two or more isolated subgra ...

, a property of a graph. * The property of being a

connected space In topology and related branches of mathematics, a connected space is a topological space that cannot be represented as the union of two or more disjoint non-empty open subsets. Connectedness is one of the principal topological properties tha ...

in topology. *

Homotopical connectivity In algebraic topology, homotopical connectivity is a property describing a topological space based on the dimension of its holes. In general, low homotopical connectivity indicates that the space has at least one low-dimensional hole. The concep ...

, a property related to the dimensions of holes in a topological space, and to its homotopy groups. *

Homological connectivity In algebraic topology, homological connectivity is a property describing a topological space based on its homology groups. Definitions Background ''X'' is ''homologically-connected'' if its 0-th homology group equals Z, i.e. H_0(X)\cong \math ...

, a property related to the homology groups of a topological space.

Biology

Neurobiology

Homotopic connectivity In biology, homotopic connectivity is the connectivity between mirror areas of the human brain Cerebral hemisphere, hemispheres. Changes in the homotopic connectivity are to disorders such as melancholic depression, major depressive disorder, sch ...

- connectivity between mirror areas of the

human brain The human brain is the central organ of the human nervous system, and with the spinal cord makes up the central nervous system. The brain consists of the cerebrum, the brainstem and the cerebellum. It controls most of the activities of the ...

hemispheres. *

Brain connectivity Brain connectivity estimators represent patterns of links in the brain. Connectivity can be considered at different levels of the brain's organisation: from neurons, to neural assemblies and brain structures. Brain connectivity involves different ...

Functional connectivity Resting state fMRI (rs-fMRI or R-fMRI) is a method of functional magnetic resonance imaging (fMRI) that is used in brain mapping to evaluate regional interactions that occur in a resting or task-negative state, when an explicit task is not being ...

Dynamic functional connectivity Dynamic functional connectivity (DFC) refers to the observed phenomenon that functional connectivity changes over a short time. Dynamic functional connectivity is a recent expansion on traditional functional connectivity analysis which typically ass ...

Ecology

Landscape connectivity In landscape ecology, landscape connectivity is, broadly, "''the degree to which the landscape facilitates or impedes movement among resource patches''". Alternatively, connectivity may be a continuous property of the landscape and independent of p ...

, the degree to which the landscape facilitates or impedes movement among resource patches. *

Permeability (spatial and transport planning) Permeability or connectivity describes the extent to which urban forms permit (or restrict) movement of people or vehicles in different directions. The terms are often used interchangeably, although differentiated definitions also exist (see belo ...

, the extent to which urban forms permit (or restrict) movement of people or vehicles in different directions.

Physics

* Connectivity, a parameter describing the topology of a