Convergence analysis of an Inexact Infeasible Interior Point method for Semidefinite Programming

In this paper we present an extension to SDP of the well known infeasible Interior Point method for linear programming of Kojima,Megiddo and Mizuno (A primal-dual infeasible-interior-point algorithm for Linear Programming, Math. Progr., 1993). The extension developed here allows the use of inexact search directions; i.e., the linear systems defining the search directions can be solved with an accuracy that increases as the solution is approached. A convergence analysis is carried out and the global convergence of the method is prove

Thermal barrier pressure seal

An apparatus is described for providing thermal and pressure sealing in an elongated space of varying width between adjacent surface of two members. The apparatus is mounted for at least limited lateral movement between the members and may comprise: an elongated support attached to one of the adjacent surfaces; a second elongated support member attached to the other of the adjacent surfaces, and an elongated seal member sandwiched between the first and second support members. In its non-deformed state, the elongated seal member may be substantially cylindrical but capable of deformation to accommodate limited lateral movement between the adjacent surfaces and varying widths of the space

On an adaptive regularization for ill-posed nonlinear systems and its trust-region implementation

In this paper we address the stable numerical solution of nonlinear ill-posed systems by a trust-region method. We show that an appropriate choice of the trust-region radius gives rise to a procedure that has the potential to approach a solution of the unperturbed system. This regularizing property is shown theoretically and validated numerically.Comment: arXiv admin note: text overlap with arXiv:1410.278

On affine scaling inexact dogleg methods for bound-constrained nonlinear systems

Within the framework of affine scaling trust-region methods for bound constrained problems, we discuss the use of a inexact dogleg method as a tool for simultaneously handling the trust-region and the bound constraints while seeking for an approximate minimizer of the model. Focusing on bound-constrained systems of nonlinear equations, an inexact affine scaling method for large scale problems, employing the inexact dogleg procedure, is described. Global convergence results are established without any Lipschitz assumption on the Jacobian matrix, and locally fast convergence is shown under standard assumptions. Convergence analysis is performed without specifying the scaling matrix used to handle the bounds, and a rather general class of scaling matrices is allowed in actual algorithms. Numerical results showing the performance of the method are also given

Duse e Novelli nelle Glossen zum Wiener Theater (1903-1906) di Hermann Bahr

L'articolo è incentrato sulla ricezione delle tourée degli attori italiani Eleonora Duse e Ermete Novelli nella Vienna fra ottocento e novecento, condotto attraverso la lettura, la traduzione e l'interpretazione dei giudizi critici espressi da Hermann Bahr: intellettuale di spicco della propria epoca, punto di raccordo fra "Berliner und Wiener Moderne", sotto il cui influsso si muoveva all'epoca la vita teatrale della capitale austriaca. Fu Hermann Bahr a preparare il successo della Duse nei paesi di lingua tedesca (viatico al successo europeo dell'attrice italiana) e fu sempre Bahr a indicare in Novelli e nella Duse - pur nella differenza sostanziale che separava le due nature artistiche - i portatori di un'arte recitativa che sembrava assolvere ai compiti posti da una nuova estetica nascente, copntrapposta all'estetica del Naturalismo, allora imperante, e che risentiva fortemente dei nuovi imèulsi forniti al teatro dallo sviluppo delle scienze umane sperimentali e delle pseudoscienze. L'articolo è seguito dalla traduzione delle critiche scritte da Bahr sulle recite dei due attori negli anni compresi fra il 1903 e il 1906: quelli in cui si disegna e si risolve la parabola del rapporto di Novelli e della Duse con i palcoscenici della città di Vienna