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- Augmented_Lagrangian_method abstract "Augmented Lagrangian methods are a certain class of algorithms for solving constrained optimization problems. They have similarities to penalty methods in that they replace a constrained optimization problem by a series of unconstrained problems and add a penalty term to the objective; the difference is that the augmented Lagrangian method adds yet another term, designed to mimic a Lagrange multiplier. The augmented Lagrangian is not the same as the method of Lagrange multipliers.Viewed differently, the unconstrained objective is the Lagrangian of the constrained problem, with an additional penalty term (the augmentation).The method was originally known as the method of multipliers, and was studied much in the 1970 and 1980s as a good alternative to penalty methods. It was first discussed by Magnus Hestenes in 1969 and by Powell in 1969. The method was studied by R. Tyrrell Rockafellar in relation to Fenchel duality, particularly in relation to proximal-point methods, Moreau–Yosida regularization, and maximal monotone operators: These methods were used in structural optimization. The method was also studied by Dimitri Bertsekas, notably in his 1982 book, together with extensions involving nonquadratic regularization functions, such as entropic regularization, which gives rise to the "exponential method of multipliers," a method that handles inequality constraints with a twice differentiable augmented Lagrangian function.Since the 1970s, sequential quadratic programming (SQP) and interior point methods (IPM) have had increasing attention, in part because they more easily use sparse matrix subroutines from numerical software libraries, and in part because IPMs have proven complexity results via the theory of self-concordant functions. The augmented Lagrangian method was rejuvenated by the optimization systems LANCELOT and AMPL, which allowed sparse matrix techniques to be used on seemingly dense but "partially separable" problems. The method is still useful for some problems.Around 2007, there was a resurgence of augmented Lagrangian methods in fields such as total-variation denoising and compressed sensing.In particular, a variant of the standard augmented Lagrangian method that uses partial updates (similar to the Gauss-Seidel method for solving linear equations) known as the alternating direction method of multipliers or ADMM gained some attention.".
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- Augmented_Lagrangian_method wikiPageWikiLink Springer-Verlag.
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- Augmented_Lagrangian_method wikiPageWikiLink Structural_engineering.
- Augmented_Lagrangian_method wikiPageWikiLink Subroutine.
- Augmented_Lagrangian_method wikiPageWikiLink Total_variation_denoising.
- Augmented_Lagrangian_method wikiPageWikiLinkText "Augmented Lagrangian method".
- Augmented_Lagrangian_method wikiPageWikiLinkText "Augmented Lagrangian method#Alternating direction method of multipliers".
- Augmented_Lagrangian_method wikiPageWikiLinkText "alternating direction method of multipliers".
- Augmented_Lagrangian_method wikiPageWikiLinkText "augmented Lagrangian".
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- Augmented_Lagrangian_method subject Category:Optimization_algorithms_and_methods.
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- Augmented_Lagrangian_method type Algorithm.
- Augmented_Lagrangian_method comment "Augmented Lagrangian methods are a certain class of algorithms for solving constrained optimization problems. They have similarities to penalty methods in that they replace a constrained optimization problem by a series of unconstrained problems and add a penalty term to the objective; the difference is that the augmented Lagrangian method adds yet another term, designed to mimic a Lagrange multiplier.".
- Augmented_Lagrangian_method label "Augmented Lagrangian method".
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