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BEGIN:VEVENT
DTSTART:20200124T220000Z
UID:146624@events.unl.edu
DTSTAMP:20191219T153643Z
ORGANIZER;CN=Roger Wiegand:MAILTO:rwiegand@unl.edu
SUMMARY:Jan Trlifaj\, Charles University in Prague
STATUS:CONFIRMED
DESCRIPTION:In 1974\, Shelah proved that Whiteheadâ€™s problem (a proposed
characterization of free abelian groups) was not decidable in ZFC (the usu
al axioms of set theory\, together with the axiom of choice). With his pro
of\, powerful set-theoretic methods entered homological algebra. However\,
one might get the impression that set-theoretic methods are primarily use
ful for proving undecidability of mathematical problems. \n\nThe talk will
demonstrate that set-theoretic methods can be employed in proving results
in homological algebra that hold in ZFC and have strong consequences for
the structure of representations of algebras\, and modules in general.
LOCATION:Avery Hall Room 115
URL://events.unl.edu/math/2020/01/24/146624/
DTEND:20200124T225000Z
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