Motivé par la recherche des solutions non négatives d'un système d'équations eiconales, avec conditions aux limites de Dirichlet, on étudie dans cette Note une méthode pour la résolution numérique de problèmes d'inéquations variationnelles paraboliques pour des ensembles convexes du type , v⩾ψ p.p. sur . La méthode numérique combine pénalité et algorithme de Newton, les problèmes linéarisés étant résolus par un algorithme de gradient conjugué qui demande à chaque iteration la résolution d'un problème linéaire pour un analogue discret de l'opérateur elliptique I−μΔ avec μ>0. Les essais numériques montrent que la méthode ainsi obtenue a de bonnes propriétés de convergence, même pour des petites valeurs du paramètre de pénalité.
Motivated by the search for non-negative solutions of a system of Eikonal equations with Dirichlet boundary conditions, we discuss in this Note a method for the numerical solution of parabolic variational inequality problems for convex sets such as , v⩾ψ a.e. on The numerical methodology combines penalty and Newton's method, the linearized problems being solved by a conjugate gradient algorithm requiring at each iteration the solution of a linear problem for a discrete analogue of the elliptic operator I−μΔ. Numerical experiments show that the resulting method has good convergence properties, even for small values of the penalty parameter.
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@article{CRMATH_2003__336_5_435_0, author = {Glowinski, Roland and Kuznetsov, Yuri A. and Pan, Tsorng-Whay}, title = {A {penalty/Newton/conjugate} gradient method for the solution of obstacle problems}, journal = {Comptes Rendus. Math\'ematique}, pages = {435--440}, publisher = {Elsevier}, volume = {336}, number = {5}, year = {2003}, doi = {10.1016/S1631-073X(03)00025-6}, language = {en}, url = {http://www.numdam.org/articles/10.1016/S1631-073X(03)00025-6/} }
TY - JOUR AU - Glowinski, Roland AU - Kuznetsov, Yuri A. AU - Pan, Tsorng-Whay TI - A penalty/Newton/conjugate gradient method for the solution of obstacle problems JO - Comptes Rendus. Mathématique PY - 2003 SP - 435 EP - 440 VL - 336 IS - 5 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/S1631-073X(03)00025-6/ DO - 10.1016/S1631-073X(03)00025-6 LA - en ID - CRMATH_2003__336_5_435_0 ER -
%0 Journal Article %A Glowinski, Roland %A Kuznetsov, Yuri A. %A Pan, Tsorng-Whay %T A penalty/Newton/conjugate gradient method for the solution of obstacle problems %J Comptes Rendus. Mathématique %D 2003 %P 435-440 %V 336 %N 5 %I Elsevier %U http://www.numdam.org/articles/10.1016/S1631-073X(03)00025-6/ %R 10.1016/S1631-073X(03)00025-6 %G en %F CRMATH_2003__336_5_435_0
Glowinski, Roland; Kuznetsov, Yuri A.; Pan, Tsorng-Whay. A penalty/Newton/conjugate gradient method for the solution of obstacle problems. Comptes Rendus. Mathématique, Tome 336 (2003) no. 5, pp. 435-440. doi : 10.1016/S1631-073X(03)00025-6. http://www.numdam.org/articles/10.1016/S1631-073X(03)00025-6/
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