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Что (кто) такое operator sections - определение
LINEAR OPERATOR DEFINED ON A DENSE LINEAR SUBSPACE
Closed operator; Closeable operator; Closable operator; Closed unbounded operator; Closure of an operator; Unbounded linear operator
Найдено результатов: 750
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.
Del
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
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]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Radio Times - 1923-12-21 - p500 (RAF advert).png?width=200 "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
Unbounded 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.
The term "unbounded operator" can be misleading, since
- "unbounded" should sometimes be understood as "not necessarily bounded";
- "operator" should be understood as "linear operator" (as in the case of "bounded operator");
- the domain of the operator is a linear subspace, not necessarily the whole space;
- this linear subspace is not necessarily closed; often (but not always) it is assumed to be dense;
- in the special case of a bounded operator, still, the domain is usually assumed to be the whole space.
In contrast to bounded operators, unbounded operators on a given space do not form an algebra, nor even a linear space, because each one is defined on its own domain.
The term "operator" often means "bounded linear operator", but in the context of this article it means "unbounded operator", with the reservations made above. The given space is assumed to be a Hilbert space. Some generalizations to Banach spaces and more general topological vector spaces are possible.
