**Alisdair Urquhart**

University of Toronto

## "Anomalous Objects"

Objects that appear to violate the rules of mathematics
and logic appear at the borderline of mathematics and
other subjects, particularly physics. A well-known
example of such an anomalous object is the Dirac delta
function. In many cases, such objects have been eventually
incorporated into the standard set-theoretical universe.
The present talk discusses strategies for incorporation,
and whether we have reasons to believe that such objects
show the standard set-theoretical universe to be inadequate.

## Friday, November 9, 2001

SSPA 2112

3 pm

*Refreshments will be served*

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