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  2. Eigenvalue algorithm - Wikipedia

    en.wikipedia.org/wiki/Eigenvalue_algorithm

    Given an n × n square matrix A of real or complex numbers, an eigenvalue λ and its associated generalized eigenvector v are a pair obeying the relation [1] =,where v is a nonzero n × 1 column vector, I is the n × n identity matrix, k is a positive integer, and both λ and v are allowed to be complex even when A is real.l When k = 1, the vector is called simply an eigenvector, and the pair ...

  3. Jacobi eigenvalue algorithm - Wikipedia

    en.wikipedia.org/wiki/Jacobi_eigenvalue_algorithm

    Learn how to calculate the eigenvalues and eigenvectors of a real symmetric matrix using the Jacobi method, an iterative algorithm proposed by Carl Gustav Jacob Jacobi in 1846. See the description, convergence, cost, algorithm and example of the method.

  4. Eigenvalues and eigenvectors - Wikipedia

    en.wikipedia.org/wiki/Eigenvalues_and_eigenvectors

    Learn about the concept of eigenvalues and eigenvectors in linear algebra, and how they characterize linear transformations and matrices. Find definitions, examples, applications, history, and related topics.

  5. Gershgorin circle theorem - Wikipedia

    en.wikipedia.org/wiki/Gershgorin_circle_theorem

    Learn about the theorem that bounds the spectrum of a square matrix by its diagonal entries and off-diagonal norms. See the statement, proof, example, discussion, and application of the theorem.

  6. Sylvester's formula - Wikipedia

    en.wikipedia.org/wiki/Sylvester's_formula

    The specific problem is: The discussion of eigenvalues with multiplicities greater than one seems to be unnecessary, as the matrix is assumed to have distinct eigenvalues. WikiProject Mathematics may be able to help recruit an expert.

  7. Eigendecomposition of a matrix - Wikipedia

    en.wikipedia.org/wiki/Eigendecomposition_of_a_matrix

    Learn how to factorize a matrix into a diagonal form using its eigenvalues and eigenvectors. Find out the conditions, properties and applications of eigendecomposition, also known as spectral decomposition for normal or real symmetric matrices.

  8. Nonlinear eigenproblem - Wikipedia

    en.wikipedia.org/wiki/Nonlinear_eigenproblem

    The NLEVP collection of nonlinear eigenvalue problems is a MATLAB package containing many nonlinear eigenvalue problems with various properties. [ 6 ] The FEAST eigenvalue solver is a software package for standard eigenvalue problems as well as nonlinear eigenvalue problems, designed from density-matrix representation in quantum mechanics ...

  9. Quadratic eigenvalue problem - Wikipedia

    en.wikipedia.org/wiki/Quadratic_eigenvalue_problem

    Quadratic eigenvalue problems arise naturally in the solution of systems of second order linear differential equations without forcing: ″ + ′ + = Where (), and ,,.If all quadratic eigenvalues of () = + + are distinct, then the solution can be written in terms of the quadratic eigenvalues and right quadratic eigenvectors as