Bounded Operator Wikipedia

Bounded operator - Wikipedia.

In functional analysis and operator theory, a bounded linear operator is a linear transformation: between topological vector spaces (TVSs) and that maps bounded subsets of to bounded subsets of . If and are normed vector spaces (a special type of TVS), then is bounded if and only if there exists some > such that for all , ? ? ? ?..

Self-adjoint operator - Wikipedia.

In mathematics, a self-adjoint operator on an infinite-dimensional complex vector space V with inner product , (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.e., equal to ....

Operator (mathematics) - Wikipedia.

In mathematics, an operator is generally a mapping or function that acts on elements of a space to produce elements of another space (possibly the same space, sometimes required to be the same space). There is no general definition of an operator, but the term is often used in place of function when the domain is a set of functions or other structured objects..

Relational operator - Wikipedia.

In computer science, a relational operator is a programming language construct or operator that tests or defines some kind of relation between two entities.These include numerical equality (e.g., 5 = 5) and inequalities (e.g., 4 >= 3).. In programming languages that include a distinct boolean data type in their type system, like Pascal, Ada, or Java, these operators usually evaluate to true ....

Spectrum (functional analysis) - Wikipedia.

Spectrum of a bounded operator Definition. Let be a bounded linear operator acting on a Banach space over the complex scalar field , and be the identity operator on .The spectrum of is the set of all for which the operator does not have an inverse that is a bounded linear operator.. Since is a linear operator, the inverse is linear if it exists; and, by the bounded inverse theorem, it is ....

C0-semigroup - Wikipedia.

Formal definition. A strongly continuous semigroup on a Banach space is a map : + such that =, (identity operator on ),: (+) = (): ? ?, as . The first two axioms are algebraic, and state that is a representation of the semigroup (+, +); the last is topological, and states that the map is continuous in the strong operator topology.. Infinitesimal generator.

Convolution - Wikipedia.

In mathematics (in particular, functional analysis), convolution is a mathematical operation on two functions (f and g) that produces a third function that expresses how the shape of one is modified by the other.The term convolution refers to both the result function and to the process of computing it. It is defined as the integral of the product of the two functions after one is ....

Bounded variation - Wikipedia.

In mathematical analysis, a function of bounded variation, also known as BV function, is a real-valued function whose total variation is bounded (finite): the graph of a function having this property is well behaved in a precise sense. For a continuous function of a single variable, being of bounded variation means that the distance along the direction of the y-axis, neglecting the ....

Philippines - Wikipedia.

The Philippines (/ ' f I l I p i: n z / (); Filipino: Pilipinas), officially the Republic of the Philippines (Filipino: Republika ng Pilipinas), is an archipelagic country in Southeast Asia.It is situated in the western Pacific Ocean and consists of around 7,641 islands that are broadly categorized under three main geographical divisions from north to south: Luzon, Visayas, and Mindanao..

Laplace operator - Wikipedia.

As a second-order differential operator, the Laplace operator maps C k functions to C k-2 functions for k >= 2.. Motivation Diffusion. In the physical theory of diffusion, the Laplace operator arises naturally in the mathematical description of equilibrium. Specifically, if u is the density at equilibrium of some quantity such as a chemical concentration, then the net flux of u through ....

Dilation (morphology) - Wikipedia.

In binary morphology, dilation is a shift-invariant (translation invariant) operator, equivalent to Minkowski addition.A binary image is viewed in mathematical morphology as a subset of a Euclidean space R d or the integer grid Z d, for some dimension d.Let E be a Euclidean space or an integer grid, A a binary image in E, and B a structuring element regarded as a subset of R d..

Gateaux derivative - Wikipedia.

In mathematics, the Gateaux differential or Gateaux derivative is a generalization of the concept of directional derivative in differential calculus.Named after Rene Gateaux, a French mathematician who died young in World War I, it is defined for functions between locally convex topological vector spaces such as Banach spaces.Like the Frechet derivative on a Banach ....

Riemann–Liouville integral - Wikipedia.

In mathematics, the Riemann-Liouville integral associates with a real function: another function I ? f of the same kind for each value of the parameter ? > 0.The integral is a manner of generalization of the repeated antiderivative of f in the sense that for positive integer values of ?, I ? f is an iterated antiderivative of f of order ?.The Riemann-Liouville integral is named for ....

Linearity - Wikipedia.

Linearity is the property of a mathematical relationship that can be graphically represented as a straight line.Linearity is closely related to proportionality.Examples in physics include rectilinear motion, the linear relationship of voltage and current in an electrical conductor (), and the relationship of mass and weight.By contrast, more complicated relationships are nonlinear..

Perron–Frobenius theorem - Wikipedia.

P is a projection operator: P 2 = P, which commutes with A: AP = PA. The image of P is one-dimensional and spanned by the Perron-Frobenius eigenvector v (respectively for P T --by the Perron-Frobenius eigenvector w for A T). P = vw T, where v,w are normalized such that w T v = 1. Hence P is a positive operator..

Riesz representation theorem - Wikipedia.

The Riesz representation theorem, sometimes called the Riesz-Frechet representation theorem after Frigyes Riesz and Maurice Rene Frechet, establishes an important connection between a Hilbert space and its continuous dual space.If the underlying field is the real numbers, the two are isometrically isomorphic; if the underlying field is the complex numbers, the two are ....

Lattice (order) - Wikipedia.

A lattice is an abstract structure studied in the mathematical subdisciplines of order theory and abstract algebra.It consists of a partially ordered set in which every pair of elements has a unique supremum (also called a least upper bound or join) and a unique infimum (also called a greatest lower bound or meet).An example is given by the power set of a set, partially ordered by ....

Distribution (mathematics) - Wikipedia.

For instance, the well-known Hermitian adjoint of a linear operator between Hilbert spaces is just the operator's transpose (but with the Riesz representation theorem used to identify each Hilbert space with its continuous dual space). In general the transpose of a continuous linear map : ....