Thursday, September 24, 2020 1:00 pm
-
1:00 pm
EDT (GMT -04:00)
Title: Sign variations and descents
| Speaker: | Aram Dermenjian |
| Affiliation: | York University |
| Zoom: | Contact Karen Yeats |
Abstract:
In
this
talk
we
consider
a
poset
structure
on
projective
sign
vectors.
We
show
that
the
order
complex
of
this
poset
is
partitionable
and
give
an
interpretation
of
the
h-vector
using
type
B
descents
of
the
type
D
Coxeter
group.
Based
on
joint
work
with
Nantel
Bergeron
and
John
Machacek,
and
is
a
continuation
of
the
work
by
John
Machacek.
arXiv
preprint:
2008.03794