Functional analysis is the branch of mathematical analysis that studies vector spaces of functions equipped with limit-related structure, such as a norm or an inner product, together with the linear maps between them that respect that structure. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
Central QuestionWhich infinite-dimensional vector spaces of functions carry enough limit structure, a norm or an inner product complete under it, to let the tools of linear algebra and calculus be applied to them together. 1 Key DebateWhether every bounded linear operator on a Hilbert space has a proper invariant subspace, a question about the operators the field's own foundational spaces support that remains an open problem in functional analysis despite the field's century of development. 1 Classification
Pure or Applied Connections
Associated With
Includes
Source Timothy Gowers (Wikipedia)
Source Vito Volterra (Wikipedia)
Showing 51 to 53 of 53 in Includes, page 2 of 2.
Sources
1. Wikipedia: Functional Analysis
Wikimedia FoundationLead section
the study of vector spaces endowed with some kind of limit-related structure
Normed vector spaces section
These spaces are of fundamental importance in many areas, including the mathematical formulation of quantum mechanics, machine learning, partial differential equations, and Fourier analysis.
Hilbert spaces section, invariant subspace problem
One of the open problems in functional analysis is to prove that every bounded linear operator on a Hilbert space has a proper invariant subspace.
Hilbert spaces
One of the open problems in functional analysis is to prove that every bounded linear operator on a Hilbert space has a proper invariant subspace.
In Group: Functional and Operator Analysis, lead paragraph
Functional analysis is a branch of mathematical analysis
View the Source Schauder fixed point theorem, Wikipedia
Includes: Leray-Schauder Fixed-Point Theorem, LeadQuote, Includes: Leray-Schauder Fixed-Point Theorem, Lead
The Schauder fixed-point theorem is an extension of the Brouwer fixed-point theorem to locally convex topological vector spaces
View the Source Fréchet Derivative (Wikipedia)
Includes: Fréchet Derivative, LeadQuote, Includes: Fréchet Derivative, Lead
the Fréchet derivative is a derivative defined on normed spaces
View the Source Bent Fuglede (Mathematics Genealogy Project)
Includes: Bent Fuglede, Degree recordQuote, Includes: Bent Fuglede, Degree record
Functional analysis
View the Source Edgar Lorch (Wikipedia)
Includes: Edgar Lorch, Lead, spectral theoryQuote, Includes: Edgar Lorch, Lead, spectral theory
functional analysis, especially spectral theory
View the Source Paul Halmos (Wikipedia)
Includes: Paul Halmos, LeadQuote, Includes: Paul Halmos, Lead
made fundamental advances in the areas of mathematical logic, probability theory, operator theory, ergodic theory, and functional analysis
View the Source Heinz Bauer (Wikipedia)
Includes: Heinz Bauer, Biography, functional analysisQuote, Includes: Heinz Bauer, Biography, functional analysis
His research focuses were potential theory, probability theory, and functional analysis.
View the Source Gian-Carlo Rota (Wikipedia)
Includes: Gian-Carlo Rota, CareerQuote, Includes: Gian-Carlo Rota, Career
Rota began his career as a functional analyst, but switched to become a distinguished combinatorialist.
View the Source Erhard Schmidt (Wikipedia)
Includes: Erhard Schmidt, MathematicsQuote, Includes: Erhard Schmidt, Mathematics
he made important contributions to functional analysis
View the Source Andrey Tychonoff (Wikipedia)
Includes: Andrey Tychonoff, LeadQuote, Includes: Andrey Tychonoff, Lead
known for important contributions to topology, functional analysis, mathematical physics
View the Source Nelson Dunford (Wikipedia)
Includes: Nelson Dunford, LeadQuote, Includes: Nelson Dunford, Lead
known for his work in functional analysis
View the Source Aryeh Dvoretzky (Wikipedia)
Includes: Aryeh Dvoretzky, Lead, fieldQuote, Includes: Aryeh Dvoretzky, Lead, field
He is best known for his work in functional analysis, statistics and probability.
View the Source Arthur Milgram (Wikipedia)
Includes: Arthur Milgram, Lead, branchQuote, Includes: Arthur Milgram, Lead, branch
He made contributions in functional analysis, combinatorics, differential geometry, topology, partial differential equations, and Galois theory.
View the Source Griffith C. Evans (Wikipedia)
Includes: Griffith C. Evans, Biography, early researchQuote, Includes: Griffith C. Evans, Biography, early research
functional analysis
View the Source Marshall H. Stone (Wikipedia)
Wikimedia FoundationIncludes: Marshall H. Stone, Lead sentenceQuote, Includes: Marshall H. Stone, Lead sentence
functional analysis
View the Source Vito Volterra (Wikipedia)
Includes: Vito Volterra, Lead, functional analysisQuote, Includes: Vito Volterra, Lead, functional analysis
being one of the founders of functional analysis
View the Source Leonid Kantorovich (Wikipedia)
Includes: Leonid Kantorovich, MathematicsQuote, Includes: Leonid Kantorovich, Mathematics
Kantorovich had important results in functional analysis, approximation theory, and operator theory
View the Source Béla Bollobás (Wikipedia)
Includes: Béla Bollobás, LeadQuote, Includes: Béla Bollobás, Lead
including functional analysis, combinatorics, graph theory, and percolation theory
View the Source Timothy Gowers (Wikipedia)
Includes: Timothy Gowers, LeadQuote, Includes: Timothy Gowers, Lead
for research connecting the fields of functional analysis and combinatorics
View the Source Jean Dieudonné (Wikipedia)
Includes: Jean Dieudonné, LeadQuote, Includes: Jean Dieudonné, Lead
notable for research in abstract algebra, algebraic geometry, and functional analysis
View the Source Allen Shields (Wikipedia)
Includes: Allen Shields, Lead, functional analysisQuote, Includes: Allen Shields, Lead, functional analysis
who worked on measure theory, complex analysis, functional analysis and operator theory
View the Source Frank Smithies (Wikipedia)
Includes: Frank Smithies, LeadQuote, Includes: Frank Smithies, Lead
who worked on integral equations, functional analysis, and the history of mathematics
View the Source Irving Segal (Wikipedia)
Includes: Irving Segal, LeadQuote, Includes: Irving Segal, Lead
in functional and harmonic analysis
View the Source Roger Godement (Wikipedia)
Includes: Roger Godement, Lead, field of workQuote, Includes: Roger Godement, Lead, field of work
known for his work in functional analysis as well as his expository books
View the Source Einar Hille (Wikipedia)
Includes: Einar Hille, Career, functional analysisQuote, Includes: Einar Hille, Career, functional analysis
Later in his career his interests turned more towards functional analysis
View the Source Invariant Subspace Problem (Wikipedia)
WikipediaIncludes: Invariant Subspace Problem, Lead sentenceQuote, Includes: Invariant Subspace Problem, Lead sentence
In the field of mathematics known as functional analysis, the invariant subspace problem is a partially unresolved problem asking
View the Source Spectral Theory of Compact Operators (Wikipedia)
Includes: Spectral Theory of Compact Operators, Lead sentenceQuote, Includes: Spectral Theory of Compact Operators, Lead sentence
In functional analysis, compact operators are linear operators on Banach spaces that map bounded sets to relatively compact sets.
View the Source Banach-Alaoglu Theorem (Wikipedia)
Wikimedia FoundationIncludes: Banach-Alaoglu Theorem, Lead sentenceView the Source Krein-Milman theorem, Wikipedia
Mercer's theorem, Wikipedia
Includes: Mercer's Theorem, Lead sentenceQuote, Includes: Mercer's Theorem, Lead sentence
In mathematics, specifically functional analysis, Mercer's theorem is a representation of a symmetric positive-definite function o
View the Source Namioka's theorem - Wikipedia
Includes: Namioka's Theorem, Lead sentenceQuote, Includes: Namioka's Theorem, Lead sentence
In functional analysis, Namioka's theorem is a result concerning the relationship between separate continuity and joint continuity
View the Source Frigyes Riesz (Wikipedia)
Includes: Frigyes Riesz, Lead paragraph [in-branch]Quote, Includes: Frigyes Riesz, Lead paragraph [in-branch]
functional analysis
View the Source Stefan Banach (Wikipedia)
Includes: Stefan Banach, Lead paragraph [in-branch]Quote, Includes: Stefan Banach, Lead paragraph [in-branch]
functional analysis
View the Source Wikipedia: Eduard Helly
Includes: Eduard Helly, LeadQuote, Includes: Eduard Helly, Lead
Helly wrote important contributions on functional analysis
View the Source Wikipedia: Shizuo Kakutani
Includes: Shizuo Kakutani, LeadQuote, Includes: Shizuo Kakutani, Lead
Kakutani received two awards of the Japan Academy, the Imperial Prize and the Academy Prize in 1982, for his scholarly achievements in general and his work on functional analysis in particular.
View the Source Wikipedia: Juliusz Schauder
Includes: Juliusz Schauder, LeadQuote, Includes: Juliusz Schauder, Lead
Juliusz Paweł Schauder ([ˈjulʲjuʂ ˈpavɛw ˈʂau̯dɛr]; 21 September 1899, October 1943) was a Polish mathematician known for his work in functional analysis, partial differential equations and mathematical physics.
View the Source Wikipedia: Hugo Steinhaus
Includes: Hugo Steinhaus, LeadQuote, Includes: Hugo Steinhaus, Lead
He is credited with "discovering" mathematician Stefan Banach, with whom he gave a notable contribution to functional analysis through the Banach-Steinhaus theorem.
View the Source Wikipedia: Hans Hahn (mathematician)
Includes: Hans Hahn, LeadQuote, Includes: Hans Hahn, Lead
Hans Hahn (; German: [haːn]; 27 September 1879-24 July 1934) was an Austrian mathematician and philosopher who made contributions to functional analysis, topology, set theory, the calculus of variations, real analysis, and order theory.
View the Source Wikipedia: Isaac Namioka
Includes: Isaac Namioka, LeadQuote, Includes: Isaac Namioka, Lead
Isaac Namioka (April 25, 1928, September 25, 2019) was a Japanese-American mathematician who worked in general topology and functional analysis.
View the Source Andrey Kolmogorov (Wikipedia)
Includes: Andrey Kolmogorov, Lead paragraphQuote, Includes: Andrey Kolmogorov, Lead paragraph
He also gave fundamental contributions to the mathematics of topology, intuitionistic logic, turbulence, classical mechanics, functional analysis, algorithmic information theory and computational complexity.
View the Source Wolfram MathWorld: Fuglede's Conjecture
Wolfram MathWorldIncludes: Fuglede's Conjecture, Subject classificationsQuote, Includes: Fuglede's Conjecture, Subject classifications
Calculus and Analysis Functional Analysis
View the Source Rellich-Kondrachov theorem, Wikipedia
Includes: Rellich-Kondrachov Theorem, Lead sectionQuote, Includes: Rellich-Kondrachov Theorem, Lead section
theorem is a compact embedding theorem concerning Sobolev spaces. It is named after the Austrian-German mathematician
View the Source MacTutor biography of Gottfried Köthe, St Andrews
Includes: Gottfried Köthe, BiographyQuote, Includes: Gottfried Köthe, Biography
who worked in abstract algebra, functional analysis and topological vector spaces
View the Source MacTutor biography of Otto Toeplitz, St Andrews
Includes: Otto Toeplitz, BiographyQuote, Includes: Otto Toeplitz, Biography
he developed a general theory of infinite dimensional spaces
View the Source MacTutor biography of Mark Krein, St Andrews
Includes: Mark Krein, SummaryQuote, Includes: Mark Krein, Summary
Mark G Krein was a Soviet mathematician who worked in functional analysis, operator theory, classical analysis and representation theory.
View the Source Gustave Choquet, Biography (MacTutor History of Mathematics)
Includes: Gustave Choquet, SummaryQuote, Includes: Gustave Choquet, Summary
Gustave Choquet was a French mathematician who worked in functional analysis, potential theory, topology and measure theory.
View the Source Laurent Schwartz, Biography (MacTutor History of Mathematics)
Includes: Laurent Schwartz, SummaryQuote, Includes: Laurent Schwartz, Summary
Laurent Schwartz was a French mathematician who is best known for his work in the theory of distributions.
View the Source Paul Lévy, Biography (MacTutor History of Mathematics)
Includes: Paul Lévy, SummaryQuote, Includes: Paul Lévy, Summary
Paul Lévy was a French mathematician who, after starting out as an expert on functional analysis, made important advances in probability theory.
View the Source Reader Challenges (0)
No disputes yet. Spotted an error or a better source? Open the first one.
Sign in to dispute this or suggest a correction.