PT EN

Numerical Linear Algebra

Program

Introduction. Matrix decompositions. Conditioning and stability. Floating point arithmetic. Error analysis.
Systems of equations. Gaussian elimination with pivoting strategies. Cholesky factorization. Stability analysis. Large systems of equations. Sparse matrix techniques. Iterative methods based on Krylov subspaces: Conjugate Gradients, GMRES, Biorthogonalization methods (BiCG and BICGstab). Convergence and spectral properties. Preconditioning.
Eigenvalues. Reduction to Hessenberg or tridiagonal forms. Rayleigh quotient and inverse iteration. QR algorithm. Lanczos iteration (symmetric case) and Arnoldi iteration (non symmetric case).

Research and Events

Events

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Defended Theses

  • Measure and randomness in locales
      Raquel Viegas Bernardes (January 2026)
      Jorge Picado
  • Graphs associated to reduced words in classical Weyl groups
      Diogo André Cardoso Conde Soares (January 2026)
      Ricardo Mamede
      José Luís Santos
  • Non-Fickian Keller-Segel models: analytical and numerical study
      Augusto Manuel de Oliveira Fernandes (December 2025)
      José Augusto Ferreira
      Paula Oliveira
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