BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Stanislav Sysala (Institute of Geonics\, Cz. Acad. Sci.) DTSTART:20211206T144000Z DTEND:20211206T161000Z DTSTAMP:20260405T174520Z UID:NSCM/44 DESCRIPTION:Title: Sa ddle-point problems with bilinear Lagrangian and convex constraints: anal ysis\, numerical solution and applications\nby Stanislav Sysala (Insti tute of Geonics\, Cz. Acad. Sci.) as part of Nečas Seminar on Continuum M echanics\n\n\nAbstract\nThe first part of the talk is concerned with an ab stract inf-sup problem \ngenerated by a bilinear Lagrangian and convex con straints. The \nconditions that guarantee no gap between the inf-sup and r elated sup-inf \nproblems are studied. A particular attention is devoted t o the inf-sup \ncondition defined for convex cones in function spaces. Nex t\, a \nregularization method convenient for solving the inf-sup problem i s \nanalyzed and a computable majorant of the critical (inf-sup) value is \nderived for purposes of a posteriori error analysis of numerical \nresul ts. The second part of the talk is devoted to applications of the \nabstra ct framework to continuum mechanics. In particular\, examples of \nlimit l oad problems and similar ones arising in classical plasticity\, \ngradient plasticity and delamination are introduced. The presented \nresults follo w from the joint work with Daya B. Reddy\, Sergey Repin and \nJaroslav Has linger.\n LOCATION:https://researchseminars.org/talk/NSCM/44/ END:VEVENT END:VCALENDAR