Divergence
Builds on Vector fieldPartial derivative
Summary
The divergence of a differentiable vector field is a scalar function. At each point, it measures the net rate of outward flow of the field per unit volume. In Cartesian coordinates it is the sum of the partial derivatives of the components.
Reading path
To understand this page from the ground up, read these 7 pages in order. The foundations come first.
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- no evidence level
- Euclidean space object
- Function concept
- Function of several variables concept
- Vector-valued function concept
- Partial derivative concept
- Vector field concept
- Divergence concept
Where this leads
168 pages build on this one.
- Harmonic function
- Laplacian
- Del operator
- Vector calculus identities
- Liouville's equation
- Conformal invariance of harmonic functions
- Shell theorem
- Green's function for the Laplacian
- Phragmén–Lindelöf principle for subharmonic functions
- Harmonic functions on Riemannian manifolds
- Weyl's law
- Pluriharmonic function
- Quaternionic analysis
- Cheng–Yau gradient estimate
- Removable singularities for harmonic functions
- Minimum principle for harmonic functions
- Bendixson–Dulac theorem
- Minimal surface equation
- Navier–Stokes existence and smoothness
- Superharmonic function
- Schrödinger equation
- Zaremba's punctured ball
- Harmonic at a point
- Newtonian potential
- Nonlinear Schrödinger equation
- Stokes flow
- Krylov–Safonov estimate
- Neumann problem
- Schwarz integral formula
- Yamabe problem
- Harmonic majorant
- Harnack inequality for parabolic equations
- Reaction–diffusion system
- KdV equation as an integrable system
- Log-modulus of a holomorphic function is subharmonic
- Single layer potential
- Mutual absolute continuity of harmonic measures
- Lusin area integral
- Dirichlet problem
- Positive harmonic function
- Weyl's lemma
- Cahn–Hilliard equation
- Harmonic function on a ball
- Brelot space
- Liouville's theorem on phase-space volume
- Maximum principle for subharmonic functions
- Fundamental solution of the Laplacian
- Herglotz representation theorem
- Euler equations
- Poisson–Jensen formula
- Subharmonic function
- Poisson's equation
- Newtonian kernel
- Porous medium equation
- Smoothness and analyticity of harmonic functions
- Spectral geometry
- Gaussian free field
- Sub-mean value property
- Finite volume method
- Riesz decomposition theorem
- Kakutani's solution of the Dirichlet problem
- Clifford analysis
- Keller–Segel model
- Boundary integral equation for the Neumann problem
- Converse of the mean value property
- Gross–Pitaevskii equation
- Local existence of harmonic conjugates
- Polyharmonic spline
- Boundary integral method for the Dirichlet problem
- Mixed finite element method
- Earnshaw's theorem
- Five-point stencil
- p-Laplacian
- Logarithmic kernel
- Spherical harmonics
- Dirichlet-to-Neumann operator
- Raviart–Thomas elements
- Plateau's problem
- Darcy's law
- Convex functions of subharmonic functions
- Harmonic measure
- Superharmonic potential
- Resolutivity of boundary functions
- Lamé equations of elasticity
- Pólya's conjecture on Laplacian eigenvalues
- Minimal harmonic function
- Riesz measure of a subharmonic function
- Martin kernel
- Klein–Gordon equation
- Calderón projector
- Fractional Laplacian
- Obstacle problem
- Energy method
- Schiffer's conjecture
- Double layer potential
- Jump relations for layer potentials
- Discrete harmonic function
- Stefan problem as a variational inequality
- Fischer decomposition
- Navier–Stokes equations
- Douglas–Radó solution of Plateau's problem
- Koebe's theorem on the mean value property
- Turing pattern
- Level-set method
- Bessel potential
- Maxwell's equations
- Perron method
- Compactness of families of harmonic functions
- Perimeter of a set
- Polyharmonic function
- Gradient estimates for harmonic functions
- p-harmonic function
- Kelvin transform
- Harnack's principle
- Poisson integral formula
- Littlewood subordination theorem
- Biharmonic equation
- Dahlberg's theorem on harmonic measure
- Boundary Harnack principle
- Green's identities
- Least harmonic majorant
- Liouville's theorem for harmonic functions
- Removable sets for bounded harmonic functions
- Calderón problem
- Dirichlet's principle
- Harmonic functions on Riemann surfaces
- Calderón–Zygmund estimates
- Mean-field game
- Hardy spaces of harmonic functions
- Wave equation
- Herglotz–Riesz kernel
- Martin boundary
- Laplace's equation
- Caloric function
- Liouville's theorem for planar harmonic functions
- Gauss's law for potentials
- Green's function of the ball
- Maximum principle for harmonic functions
- Steklov eigenvalue problem
- Hadamard three-circle theorem for subharmonic functions
- Lindelöf's maximum principle
- Condenser capacity
- Heat equation
- Helmholtz equation
- Poisson kernel
- Schrödinger operator
- Harmonic measure as exit distribution
- Bateman transform
- Parabolic and hyperbolic Riemann surfaces
- Poisson integral for the half-space
- Hearing the shape of a drum
- Logarithmic potential
- Harmonic space
- Harmonic polynomial
- Hadamard's two-constants theorem
- Schwarz reflection principle for harmonic functions
- Method of fundamental solutions
- Bôcher's theorem
- Dirichlet eigenvalue
- Harnack's inequality
- Free boundary problem
- Expansion in spherical harmonics
- Monogenic function
- Allen–Cahn equation
- Hartogs lemma for subharmonic functions
- Dirac operator
- Boundary integral equation for the Dirichlet problem
- Lane–Emden equation
Further reading
- Web https://en.wikipedia.org/wiki/Divergence, Physical interpretation of divergence
- Web https://en.wikipedia.org/wiki/Divergence, Definition
About this page
| Tag | 0MWV6ZTK6S |
|---|---|
| URI | m2://0MWV6ZTK6S |
| Aliases | div |
| Kind | concept |
| Writing | W1 stated |
| MSC | 26B12 |
| Uses | Vector field, Partial derivative |
| Same as |
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What this page needs for W2
- edge instance_of in: at least two examples (0 of 2)
- edge not_instance_of in: at least one non-example (0 of 1)
- edge specializes both: the more general notions and the special cases (0 of 1)
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Definitions
Used by
- Laplacian
- Del operator
- Bendixson–Dulac theorem
- Minimal surface equation
- Navier–Stokes existence and smoothness
- Stokes flow
- Liouville's theorem on phase-space volume
- Euler equations
- Finite volume method
- Keller–Segel model
- Mixed finite element method
- p-Laplacian
- Raviart–Thomas elements
- Darcy's law
- Lamé equations of elasticity
- Navier–Stokes equations
- Level-set method
- Maxwell's equations
- Perimeter of a set
- Mean-field game