Thursday, August 1, 2019

Thursday, August 1, 2019 — 2:30 PM EDT

Title: Non-Commutative Algebras and Graphs

Speaker: Chris Godsil Affiliation: University of Waterloo Room: MC 5479

Abstract:

I will discuss some of the non-commutative algebras that arise naturally in graph theory.

Thursday, August 1, 2019 — 3:30 PM EDT

Title: Counting subdivergence-free gluing of trees

Speaker: Clair Dai Affiliation: University of Waterloo Room: MC 5417

Abstract:

If we take two rooted trees with the same number of leaves and form a graph by gluing the leaves of one tree to the other, then we say the graph is subdivergence-free if no 2-edge cut have been generated.

Thursday, August 1, 2019 — 3:30 PM EDT

Title: The combinatorics of nearest and furthest values

Speaker: Lily Wang Affiliation: University of Waterloo Room: MC 5417

Abstract:

A classical problem asks us to find, for each element $A[i]$ of an array of integers, the position of the nearest smallest element.

Thursday, August 1, 2019 — 3:30 PM EDT

Title: Bijections among symmetric tableaux via folding and mixed insertion

Speaker: Yuval Ohapkin Affiliation: University of Waterloo Room: MC 5417

Abstract:

A standard Young tableau with entries $-M < \cdots -1 < 1 < \cdots < M$ can be "folded" by performing certain conversions and rectifications in sequence.

S M T W T F S
28
29
30
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
  1. 2019 (143)
    1. October (14)
    2. September (15)
    3. August (9)
    4. July (17)
    5. June (18)
    6. May (16)
    7. April (9)
    8. March (24)
    9. February (13)
    10. January (8)
  2. 2018 (138)
    1. December (2)
    2. November (18)
    3. October (14)
    4. September (9)
    5. August (2)
    6. July (10)
    7. June (13)
    8. May (17)
    9. April (9)
    10. March (19)
    11. February (14)
    12. January (11)
  3. 2017 (103)
  4. 2016 (137)
  5. 2015 (136)
  6. 2014 (88)
  7. 2013 (48)
  8. 2012 (39)
  9. 2011 (36)
  10. 2010 (40)
  11. 2009 (40)
  12. 2008 (39)
  13. 2007 (15)