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Everything about Divide-and-conquer eigenvalue algorithm

Algorithm on Hermitian matrices

Divide-and-conquer eigenvalue algorithms are a class of eigenvalue algorithms for Hermitian or real symmetric matrices that have recently become competitive in terms of stability and efficiency with more traditional algorithms such as the QR algorithm. The basic concept behind these algorithms is the divide-and-conquer approach from computer science. An eigenvalue problem is divided into two problems of roughly half the size, each of these are solved recursively, and the eigenvalues of the original problem are computed from the results of these smaller problems. Wikipedia →

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  1. Read the overview: Divide-and-conquer eigenvalue algorithmA 5-minute orientation
  2. Read the landmark paper: A Parallel Divide and Conquer Algorithm for the Symmetric Eigenvalue Problem on Distributed Memory ArchitecturesCited 64 times
  3. Go sideways: Lanczos algorithmA closely related topic
  4. Go sideways: Arrowhead matrixA closely related topic

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