retarded operator - определение. Что такое retarded operator
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Что (кто) такое retarded operator - определение

PROPAGATION DELAY OF EM RADIATION (LIGHT)
Retarded Time
  • Position vectors '''r''' and '''r′''' used in the calculation.
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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         
  • DCG chart:

A simple chart depicting all rules pertaining to second derivatives.
D, C, G, L and CC stand for divergence, curl, gradient, Laplacian and curl of curl, respectively.

Arrows indicate existence of second derivatives. Blue circle in the middle represents curl of curl, whereas the other two red circles (dashed) mean that DD and GG do not exist.
  • 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.
Del         
  • DCG chart:

A simple chart depicting all rules pertaining to second derivatives.
D, C, G, L and CC stand for divergence, curl, gradient, Laplacian and curl of curl, respectively.

Arrows indicate existence of second derivatives. Blue circle in the middle represents curl of curl, whereas the other two red circles (dashed) mean that DD and GG do not exist.
  • 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
·noun Share; portion; part.
Unbounded operator         
LINEAR OPERATOR DEFINED ON A DENSE LINEAR SUBSPACE
Closed operator; Closeable operator; Closable operator; Closed unbounded operator; Closure of an operator; Unbounded linear operator
In mathematics, more specifically functional analysis and operator theory, the notion of unbounded operator provides an abstract framework for dealing with differential operators, unbounded observables in quantum mechanics, and other cases.
Preclosure operator         
CLOSURE OPERATOR
Čech closure operator; Praclosure; Cech closure operator; Praclosure operator; Preclosure
In topology, a preclosure operator, or Čech closure operator is a map between subsets of a set, similar to a topological closure operator, except that it is not required to be idempotent. That is, a preclosure operator obeys only three of the four Kuratowski closure axioms.
Order operator         
OPERATOR CHARACTERIZING THE PHASE OF A SYSTEM
Disorder operator
In quantum field theory, an order operator or an order field is a quantum field version of Landau's order parameter whose expectation value characterizes phase transitions. There exists a dual version of it, the disorder operator or disorder field, whose expectation value characterizes a phase transition by indicating the prolific presence of defect or vortex lines in an ordered phase.
?:         
TERNARY OPERATOR "X ? Y : Z" IN MANY PROGRAMMING LANGUAGES, WHOSE VALUE IS Y IF X EVALUATES TO TRUE AND Z OTHERWISE
? :; Operator?:; Shorthand conditional; Inline if; Ternary conditional operation; Ternary if; Ternary selection operator; Hook operator; Ternary conditional; ?:
In computer programming, is a ternary operator that is part of the syntax for basic conditional expressions in several programming languages. It is commonly referred to as the conditional operator, inline if (iif), or ternary if.
Radio operator         
  • RAF]] advertisement recruiting “Wireless Operators”, from the 21 December 1923 edition of ''[[The Radio Times]]''
PERSON WHO IS RESPONSIBLE FOR THE OPERATIONS OF A RADIO SYSTEM
Wireless operator
A radio operator (also, formerly, wireless operator in British and Commonwealth English) is a person who is responsible for the operations of a radio system. The profession of radio operator has become largely obsolete with the automation of radio-based tasks in recent decades.
Self-adjoint operator         
DENSELY DEFINED OPERATOR ON A HILBERT SPACE WHOSE DOMAIN COINCIDES WITH THAT OF ITS ADJOINT AND WHICH EQUALS ITS ADJOINT; SYMMETRIC OPERATOR WHOSE ADJOINT'S DOMAIN EQUALS ITS OWN DOMAIN
Hermitian operator; Selfadjoint operator; Self adjoint operator; Essentially self-adjoint; Hermitian operators; Hermiticity; Symmetric operator; Self-adjoint operators; Essentially self-adjoint operator; Hahn-Hellinger theorem
In mathematics, a self-adjoint operator on an infinite-dimensional complex vector space V with inner product \langle\cdot,\cdot\rangle (equivalently, a Hermitian operator in the finite-dimensional case) is a linear map A (from V to itself) that is its own adjoint. If V is finite-dimensional with a given orthonormal basis, this is equivalent to the condition that the matrix of A is a Hermitian matrix, i.
Operator topologies         
TOPOLOGIES ON THE SET OF OPERATORS ON A HILBERT SPACE
Topologies on the set of operators on a Hilbert space; Uniform operator topology; Operator topology
In the mathematical field of functional analysis there are several standard topologies which are given to the algebra of bounded linear operators on a Banach space .

Википедия

Retarded time

In electromagnetism, electromagnetic waves in vacuum travel at the speed of light c, according to Maxwell's Equations. The retarded time is the time when the field began to propagate from the point where it was emitted to an observer. The term "retarded" is used in this context (and the literature) in the sense of propagation delays.