First-order system least squares for second-order partial differential equations: part I
SIAM Journal on Numerical Analysis - Special issue: the articles in this issue are dedicated to Seymour V. Parter
First-Order System Least Squares for Second-Order Partial Differential Equations: Part II
SIAM Journal on Numerical Analysis
Finite Element Methods of Least-Squares Type
SIAM Review
First-Order System $\CL\CL^*$ (FOSLL*): Scalar Elliptic Partial Differential Equations
SIAM Journal on Numerical Analysis
Pseudospectral Least-Squares Method for the Second-Order Elliptic Boundary Value Problem
SIAM Journal on Numerical Analysis
First-Order System LL* (FOSLL*) for General Scalar Elliptic Problems in the Plane
SIAM Journal on Numerical Analysis
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The adjoint approach for Legendre pseudospectral least-squares methods is presented by adopting the adjoint first-order systems developed in [Z. Cai, T. Manteuffel, S. McCormick, J. Ruge, First-order system LL^* (FOSLL*): scalar elliptic partial differential equations, SIAM J. Numer. Anal. 39 (2001) 1418-1445]. The discrete adjoint least-squares functional on a polynomial space using Legendre-Gauss-Lobatto points and weights is shown to be equivalent to H^1 norm. The spectral convergence is also provided with several numerical results.