Constrained quadratic optimization problems with applications

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3 Scopus citations


Optimization problems involving strictly quadratic constraints arise in many algorithmic developments in signal processing, applied mathematics, physics, and control theory. In this paper, a framework is developed based on 1) incorporating diagonal matrices into the cost function and/or the constraints, and 2) exploiting the symmetry of quadratic constraints in the Lagrangian function. Using this framework, many algorithms for true principal and minor component extraction and true principal singular component analysis are derived from optimizing a weighted inverse Rayleigh quotient and weighted Rayleigh quotient like criteria. The main features of these algorithms are that they are self-stabilizing, can compute multiple principal, minor or singular components, and they ensure orthogonality. Additionally, using a logarithmic cost function, fast convergent power-like methods for computing principal components and singular vectors are developed. Three lists for minor component analysis, principal component analysis, and principal singular component analysis are provided.

Original languageEnglish (US)
Article numberWeA08.3
Pages (from-to)243-248
Number of pages6
JournalProceedings of the American Control Conference
StatePublished - 2005
Event2005 American Control Conference, ACC - Portland, OR, United States
Duration: Jun 8 2005Jun 10 2005


  • Bi-iteration
  • Eigenvalue problem
  • Information criteria
  • Learning algorithms
  • Minor component analysis (MCA)
  • Power method
  • Principal component analysis (PCA)
  • Principal singular component analysis (PSCA)
  • Self-normalizing neural networks
  • Subspace methods


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