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SUMMARY:Heinz Bauschke (UBC-O hosted) (UBC Okanagan)
DTSTART:20231005T210000Z
DTEND:20231005T220000Z
DTSTAMP:20260422T000609Z
UID:SFUOR/25
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/SFUOR/25/">O
 n the Composition of Two Linear Projections</a>\nby Heinz Bauschke (UBC-O 
 hosted) (UBC Okanagan) as part of PIMS-CORDS SFU Operations Research Semin
 ar\n\nLecture held in ASB 10908.\n\nAbstract\nProjection operators are fun
 damental algorithmic operators in Analysis and Optimization. It is well kn
 own that these operators are firmly nonexpansive\; however\, their compos
 ition is generally only averaged and no longer firmly nonexpansive. We wi
 ll introduce the modulus of averagedness and provide an exact result for t
 he composition of two linear projection operators. As a consequence\, we d
 educe that the Ogura-Yamada bound for the modulus of the composition is sh
 arp. Based on joint work with Theo Bendit and Walaa Moursi.\n
LOCATION:https://researchseminars.org/talk/SFUOR/25/
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