BEGIN:VCALENDAR
PRODID:-//Ben Fortuna//iCal4j 1.0//EN
VERSION:2.0
CALSCALE:GREGORIAN
X-WR-CALNAME:Calendar
BEGIN:VEVENT
DTSTAMP:20220816T185310Z
SUMMARY: Martin Schmidt:The Cost of Not Knowing Enough: Mixed-Integer Opt
imization with Lipschitz Nonlinearities
DESCRIPTION:Many mixed-integer optimization problems are constrained by n
onlinear functions that do not possess desirable analytical properties l
ike convexity or factorability or cannot even be evaluated exactly. This
is\, e.g.\, the case for many problems constrained by differential equa
tions or for models that rely on black-box simulation runs. For these pr
oblem classes\, we present\, analyze\, and test algorithms that solve mi
xed-integer problems with Lipschitz continuous nonlinearities. Our theor
etical results depend on the assumptions made on the (in)exactness of fu
nction evaluations and on the knowledge of Lipschitz constants. If Lipsc
hitz constants are known\, we prove finite termination at approximate gl
obally optimal points both for the case of exact and inexact function ev
aluations. If only approximate Lipschitz constants are known\, we prove
finite termination and derive additional conditions under which infeasib
ility can be detected. A computational study for gas transport problems
and an academic case study show the applicability of our algorithms to r
eal-world problems and how different assumptions on the constraint funct
ions up- or downgrade the practical performance of the methods.
\n
LOCATION:KTH\, 3721
DTSTART:20220502T090000Z
DTEND:20220502T100000Z
UID:6d93ef8c-40ae-4eca-8378-d324e0492e32
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20220816T185310Z
SUMMARY:Alessio D'AlĂ¬: On the Koszul property for quadratic Artinian Gore
nstein graded rings
LOCATION:Zoom
DTSTART:20220502T130000Z
DTEND:20220502T140000Z
UID:5efdbebd-ca79-4856-aee1-a54fbe184c47
END:VEVENT
END:VCALENDAR