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SUMMARY:Limit objects and emergence - Miklós Rédei (LSE)
DTSTART:20240214T130000Z
DTEND:20240214T143000Z
UID:TALK211558@talks.cam.ac.uk
CONTACT:Neil Dewar
DESCRIPTION:The talk discusses the role and some features of limit objects
  in physical theories. The talk recalls the concept of limit object unders
 tood in the sense of (mathematical) category theory\, and defines the noti
 on of emergent property of a limit object. Examples of limit objects and e
 mergent properties are given\, and it is argued that limit objects in phys
 ical theories display a tension between two norms of theory construction i
 n physics: one norm dictates that one should have physical theories descri
 bing all the phenomena in a certain domain. The other norm intends to rest
 rict the entities featuring in physical theories to those that have a coun
 terpart in the physical world\, thereby not allowing imaginary objects tha
 t cannot be interpreted realistically. The tension is illustrated by how t
 he infinite Ising model describes phase transition and a suggestion is mad
 e about how to tolerate the tension.
LOCATION:Seminar Room 2\, Department of History and Philosophy of Science
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