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Qu'est-ce (qui) est D'Alembert operator - définition
D'Alembert operator
SECOND-ORDER DIFFERENTIAL OPERATOR
D'Alembertian; Quabla; D'Alembertian operator; Wave operator; ⧠; D'alembertian; Box operator; Quabla operator
In special relativity, electromagnetism and wave theory, the d'Alembert operator (denoted by a box: \Box), also called the d'Alembertian, wave operator, box operator or sometimes quabla operator (cf. nabla symbol) is the Laplace operator of Minkowski space.
Transfer operator
PUSHFORWARD ON THE SPACE OF MEASURABLE FUNCTIONS
Ruelle operator; Perron-Frobenius operator; Perron-Frobenius Operator; Frobenius-Perron operator; Bernoulli operator; Ruelle-Frobenius-Perron operator; Frobenius–Perron operator; Perron–Frobenius operator
In mathematics, the transfer operator encodes information about an iterated map and is frequently used to study the behavior of dynamical systems, statistical mechanics, quantum chaos and fractals. In all usual cases, the largest eigenvalue is 1, and the corresponding eigenvector is the invariant measure of the system.
Del
![Del operator,<br />represented by<br />the [[nabla symbol]]](https://commons.wikimedia.org/wiki/Special:FilePath/Del.svg?width=200 "Del operator,<br />represented by<br />the [[nabla symbol]]")
VECTOR'S DIFFERENTIAL OPERATOR
Nabla constant; Atled; Nabla operator; Del operator; Vector differential; Vector differential operator; Gradient operator; Divergence operator
Del, or nabla, is an operator used in mathematics (particularly in vector calculus) as a vector differential operator, usually represented by the nabla symbol ∇. When applied to a function defined on a one-dimensional domain, it denotes the standard derivative of the function as defined in calculus.
