Thursday, April 4, 2013 3:30 pm
-
3:30 pm
EDT (GMT -04:00)
David McLaughlin, Department of Pure Mathematics, University of Waterloo
"Projective Posets"
A
poset
is
said
to
be
projective
if
its
only
idempotent
polymorphisms
are
projections.
We
will
try
to
classify
projective
posets
using
combinatorial
properties.
Projective
posets
of
height
1
are
completely
understood.
Moreover,
we
know
exactly
when
posets
of
height
1
have
Taylor
polymorphisms.
We
will
also
discuss
known
results
about
posets
of
greater
height.