Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Free
Faster access than browser!
 

Banach space and Hahn–Banach theorem

Shortcuts: Differences, Similarities, Jaccard Similarity Coefficient, References.

Difference between Banach space and Hahn–Banach theorem

Banach space vs. Hahn–Banach theorem

In mathematics, more specifically in functional analysis, a Banach space (pronounced) is a complete normed vector space. In mathematics, the Hahn–Banach theorem is a central tool in functional analysis.

Similarities between Banach space and Hahn–Banach theorem

Banach space and Hahn–Banach theorem have 19 things in common (in Unionpedia): Bounded operator, Closure (topology), Continuous function, Convex function, Dual space, Eduard Helly, Functional analysis, Hans Hahn (mathematician), Linear form, Linear subspace, Locally convex topological vector space, Mathematics, Norm (mathematics), Normed vector space, Separable space, Stefan Banach, Sublinear function, Topological vector space, Vector space.

Bounded operator

In functional analysis, a bounded linear operator is a linear transformation L between normed vector spaces X and Y for which the ratio of the norm of L(v) to that of v is bounded above by the same number, over all non-zero vectors v in X. In other words, there exists some M\ge 0 such that for all v in X The smallest such M is called the operator norm \|L\|_ \, of L. A bounded linear operator is generally not a bounded function; the latter would require that the norm of L(v) be bounded for all v, which is not possible unless L(v).

Banach space and Bounded operator · Bounded operator and Hahn–Banach theorem · See more »

Closure (topology)

In mathematics, the closure of a subset S of points in a topological space consists of all points in S together with all limit points of S. The closure of S may equivalently be defined as the union of S and its boundary, and also as the intersection of all closed sets containing S. Intuitively, the closure can be thought of as all the points that are either in S or "near" S. A point which is in the closure of S is a point of closure of S. The notion of closure is in many ways dual to the notion of interior.

Banach space and Closure (topology) · Closure (topology) and Hahn–Banach theorem · See more »

Continuous function

In mathematics, a continuous function is a function for which sufficiently small changes in the input result in arbitrarily small changes in the output.

Banach space and Continuous function · Continuous function and Hahn–Banach theorem · See more »

Convex function

In mathematics, a real-valued function defined on an ''n''-dimensional interval is called convex (or convex downward or concave upward) if the line segment between any two points on the graph of the function lies above or on the graph, in a Euclidean space (or more generally a vector space) of at least two dimensions.

Banach space and Convex function · Convex function and Hahn–Banach theorem · See more »

Dual space

In mathematics, any vector space V has a corresponding dual vector space (or just dual space for short) consisting of all linear functionals on V, together with the vector space structure of pointwise addition and scalar multiplication by constants.

Banach space and Dual space · Dual space and Hahn–Banach theorem · See more »

Eduard Helly

Eduard Helly (June 1, 1884, Vienna – 1943, Chicago) was a mathematician after whom Helly's theorem, Helly families, Helly's selection theorem, Helly metric, and the Helly–Bray theorem were named.

Banach space and Eduard Helly · Eduard Helly and Hahn–Banach theorem · See more »

Functional analysis

Functional analysis is a branch of mathematical analysis, the core of which is formed by the study of vector spaces endowed with some kind of limit-related structure (e.g. inner product, norm, topology, etc.) and the linear functions defined on these spaces and respecting these structures in a suitable sense.

Banach space and Functional analysis · Functional analysis and Hahn–Banach theorem · See more »

Hans Hahn (mathematician)

Hans Hahn (27 September 1879 – 24 July 1934) was an Austrian mathematician who made contributions to functional analysis, topology, set theory, the calculus of variations, real analysis, and order theory.

Banach space and Hans Hahn (mathematician) · Hahn–Banach theorem and Hans Hahn (mathematician) · See more »

Linear form

In linear algebra, a linear functional or linear form (also called a one-form or covector) is a linear map from a vector space to its field of scalars.

Banach space and Linear form · Hahn–Banach theorem and Linear form · See more »

Linear subspace

In linear algebra and related fields of mathematics, a linear subspace, also known as a vector subspace, or, in the older literature, a linear manifold, is a vector space that is a subset of some other (higher-dimension) vector space.

Banach space and Linear subspace · Hahn–Banach theorem and Linear subspace · See more »

Locally convex topological vector space

In functional analysis and related areas of mathematics, locally convex topological vector spaces or locally convex spaces are examples of topological vector spaces (TVS) that generalize normed spaces.

Banach space and Locally convex topological vector space · Hahn–Banach theorem and Locally convex topological vector space · See more »

Mathematics

Mathematics (from Greek μάθημα máthēma, "knowledge, study, learning") is the study of such topics as quantity, structure, space, and change.

Banach space and Mathematics · Hahn–Banach theorem and Mathematics · See more »

Norm (mathematics)

In linear algebra, functional analysis, and related areas of mathematics, a norm is a function that assigns a strictly positive length or size to each vector in a vector space—save for the zero vector, which is assigned a length of zero.

Banach space and Norm (mathematics) · Hahn–Banach theorem and Norm (mathematics) · See more »

Normed vector space

In mathematics, a normed vector space is a vector space over the real or complex numbers, on which a norm is defined.

Banach space and Normed vector space · Hahn–Banach theorem and Normed vector space · See more »

Separable space

In mathematics, a topological space is called separable if it contains a countable, dense subset; that is, there exists a sequence \_^ of elements of the space such that every nonempty open subset of the space contains at least one element of the sequence.

Banach space and Separable space · Hahn–Banach theorem and Separable space · See more »

Stefan Banach

Stefan Banach (30 March 1892 – 31 August 1945) was a Polish mathematician who is generally considered one of the world's most important and influential 20th-century mathematicians.

Banach space and Stefan Banach · Hahn–Banach theorem and Stefan Banach · See more »

Sublinear function

A sublinear function (or functional, as is more often used in functional analysis), in linear algebra and related areas of mathematics, is a function f: V \rightarrow \mathbf on a vector space V over F, an ordered field (e.g. the real numbers \mathbb), which satisfies \mathbf and any x ∈ V (positive homogeneity), and f(x + y) \le f(x) + f(y) for any x, y ∈ V (subadditivity).

Banach space and Sublinear function · Hahn–Banach theorem and Sublinear function · See more »

Topological vector space

In mathematics, a topological vector space (also called a linear topological space) is one of the basic structures investigated in functional analysis.

Banach space and Topological vector space · Hahn–Banach theorem and Topological vector space · See more »

Vector space

A vector space (also called a linear space) is a collection of objects called vectors, which may be added together and multiplied ("scaled") by numbers, called scalars.

Banach space and Vector space · Hahn–Banach theorem and Vector space · See more »

The list above answers the following questions

Banach space and Hahn–Banach theorem Comparison

Banach space has 158 relations, while Hahn–Banach theorem has 42. As they have in common 19, the Jaccard index is 9.50% = 19 / (158 + 42).

References

This article shows the relationship between Banach space and Hahn–Banach theorem. To access each article from which the information was extracted, please visit:

Hey! We are on Facebook now! »