Linear algebra | Operator theory | Representation theory

Invariant subspace

In mathematics, an invariant subspace of a linear mapping T : V → V i.e. from some vector space V to itself, is a subspace W of V that is preserved by T; that is, T(W) ⊆ W. (Wikipedia).

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Example of Invariant Subspace

Matrix Theory: Let T: R^4 to R^4 be the linear transformation that sends v to Av where A = [0 0 0 -1 \ 1 0 0 0 \ 0 1 0 -2 \ 0 0 1 0]. Find all subspaces invariant under T.

From playlist Matrix Theory

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Eva Gallardo Gutiérrez: The invariant subspace problem: a concrete operator theory approach

Abstract: The Invariant Subspace Problem for (separable) Hilbert spaces is a long-standing open question that traces back to Jonhn Von Neumann's works in the fifties asking, in particular, if every bounded linear operator acting on an infinite dimensional separable Hilbert space has a non-

From playlist Analysis and its Applications

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Invariant Subspaces

Invariant subspaces. Eigenvalues and eigenvectors. A list of eigenvectors correpsonding to distinct eigenvalues is linearly indepenedent. The number of distinct eigenvalues is at most the dimension of the vector space.

From playlist Linear Algebra Done Right

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Subspaces are the Natural Subsets of Linear Algebra | Definition + First Examples

A subspace is a subset that respects the two basic operations of linear algebra: vector addition and scalar multiplication. We say they are "closed under vector addition" and "closed under scalar multiplication". On a subspace, you can do linear algebra! Indeed, a subspace is an example of

From playlist Linear Algebra (Full Course)

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Linear Algebra: What is a Subspace?

Learn the basics of Linear Algebra with this series from the Worldwide Center of Mathematics. Find more math tutoring and lecture videos on our channel or at http://centerofmath.org/

From playlist Basics: Linear Algebra

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Union of subspaces

Classic linear algebra exercise: the union of a subspace is a subspace if and only if one is contained in the other. This is also good practice with the definition of a subspace, and also shows how to prove statements of the form p implies (q or r) Check out my vector space playlist: http

From playlist Vector Spaces

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Subspaces

Subspaces of a vector space. Sums and direct sums.

From playlist Linear Algebra Done Right

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Spectral Theorem for Real Matrices: General nxn Case

Linear Algebra: We state and prove the Spectral Theorem for real vector spaces. That is, if A is a real nxn symmetric matrix, we show that A can be diagonalized using an orthogonal matrix. The proof refers to the 2x2 case and to results from the video Beyond Eigenspaces: Real Invariant

From playlist MathDoctorBob: Linear Algebra I: From Linear Equations to Eigenspaces | CosmoLearning.org Mathematics

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Representation Theory(Repn Th) 3 by Gerhard Hiss

DATE & TIME 05 November 2016 to 14 November 2016 VENUE Ramanujan Lecture Hall, ICTS Bangalore Computational techniques are of great help in dealing with substantial, otherwise intractable examples, possibly leading to further structural insights and the detection of patterns in many abstra

From playlist Group Theory and Computational Methods

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Beyond Eigenspaces: Real Invariant Planes

Linear Algebra: In the context of real vector spaces, one often needs to work with complex eigenvalues. Let A be a real nxn matrix A. We show that, in R^n, there exists at least one of: an (nonzero) eigenvector for A, or a 2-dimensional subspace (plane) invariant under A.

From playlist MathDoctorBob: Linear Algebra I: From Linear Equations to Eigenspaces | CosmoLearning.org Mathematics

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Positive Semi-Definite Matrix 2: Spectral Theorem

Matrix Theory: Following Part 1, we note the recipe for constructing a (Hermitian) PSD matrix and provide a concrete example of the PSD square root. We prove the Spectral Theorem for C^n in the remaining 9 minutes.

From playlist Matrix Theory

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Proof that the Kernel of a Linear Transformation is a Subspace

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Proof that the Kernel of a Linear Transformation is a Subspace

From playlist Proofs

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Koopman Observable Subspaces & Finite Linear Representations of Nonlinear Dynamics for Control

This video illustrates the use of the Koopman operator to simulate and control a nonlinear dynamical system using a linear dynamical system on an observable subspace. From the Paper: Koopman observable subspaces and finite linear representations of nonlinear dynamical systems for contro

From playlist Research Abstracts from Brunton Lab

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Stefan Teufel: Peierls substitution for magnetic Bloch bands

Find this video and other talks given by worldwide mathematicians on CIRM's Audiovisual Mathematics Library: http://library.cirm-math.fr. And discover all its functionalities: - Chapter markers and keywords to watch the parts of your choice in the video - Videos enriched with abstracts, b

From playlist SPECIAL 7th European congress of Mathematics Berlin 2016.

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Subspaces

What's a subspace of a vector space? How do we check if a subset is a subspace?

From playlist Linear Algebra

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RT1: Representation Theory Basics

Representation Theory: We present basic concepts about the representation theory of finite groups. Representations are defined, as are notions of invariant subspace, irreducibility and full reducibility. For a general finite group G, we suggest an analogue to the finite abelian case, whe

From playlist *** The Good Stuff ***

Related pages

Subrepresentation | Group representation | Algebraically closed field | Linear span | Linear subspace | Fundamental theorem of algebra | Vector space | Linear algebra | Self-adjoint operator | Fixed point (mathematics) | Maximal ideal | Invariant subspace problem | Lattice (order) | Algebra homomorphism | Group (mathematics) | Bounded operator | Banach space | Algebra over a field | Dimension (vector space) | Equivalence class | Mathematics | Charles Read (mathematician) | Real number | Invariant manifold | Basis (linear algebra) | Regular representation | Hilbert space | Complex number | Finite-rank operator | Restriction (mathematics) | Matrix (mathematics) | Irreducible representation | Rotation (mathematics)