CONFERENCES ORGANIZED:

TOPOLOGY OF STRATIFIED SPACES,
(with Greg Friedman, Eugenie Hunsicker and Anatoly Libgober),
MSRI, Berkeley, September 812, 2008.
Conference Proceedings Volume.

SINGULARITIES IN THE MIDWEST,
University of WisconsinMadison, Madison, WI, March 1920, 2010.

SINGULARITY THEORY CONFERENCE,
University of Science and Technology of China, Hefei, China, July 2531, 2011.
Conference Proceedings Volume.

SINGULARITIES IN THE MIDWEST, II,
University of WisconsinMadison, Madison, WI, March 2224, 2012.
 AMS Special Session on
SINGULAR SPACES IN GEOMETRY, TOPOLOGY AND ALGEBRA at the
Spring Western Sectional Meeting,
(with Greg Friedman)
University of Colorado Boulder, Boulder, CO, April 1314, 2013.
 Special Session on
SINGULARITIES IN GEOMETRY AND TOPOLOGY at the
2nd PRIMA Congress,
(with Jiang Guangfeng, Mutsuo Oka and Jose Seade)
Shanghai Jiaotong University, Shanghai, China, June 2428, 2013.

STRATIFIED SPACES IN GEOMETRIC AND COMPUTATIONAL TOPOLOGY AND PHYSICS,
(with S. Cappell, M. Nicolau and K. Orr)
University of WisconsinMadison, Madison, WI, March 30April 2, 2015.

WORKSHOP FOR YOUNG RESEARCHERS IN MATHEMATICS,
(with C. Costara, C. Enache, D. Ibadula, L. Ignat and A. Macinic)
Ovidius University, Constanta, Romania, May 2124, 2015.
 Special Session
GEOMETRY AND TOPOLOGY OF DIFFERENTIABLE MANIFOLDS AND ALGEBRAIC VARIETIES at the
Eighth Congress of Romanian Mathematicians,
(with Anca Macinic and Stefan Papadima)
Iasi, Romania, June 26  July 1, 2015.

COMPUTATIONAL GEOMETRIC TOPOLOGY IN ARRANGEMENT THEORY,
(with N. Budur, G. Denham, A. Macinic, D. Matei, H. Schenck and M. Wakefield)
ICERMBrown University, July 610, 2015.
 AMS Special Session on
SINGULARITIES IN ALGEBRA, GEOMETRY AND TOPOLOGY at the
Central Fall Sectional Meeting,
(with Manuel Gonzalez Villa)
Loyola University Chicago, Chicago, IL, October 34, 2015.

SINGULARITIES IN THE MIDWEST, III,
(with Manuel Gonzalez Villa)
University of WisconsinMadison, Madison, WI, March 2124, 2016.

WORKSHOP FOR YOUNG RESEARCHERS IN MATHEMATICS,
(with C. Costara, C. Enache, D. Ibadula, L. Ignat and A. Macinic)
Ovidius University, Constanta, Romania, May 1922, 2016.
 Focus Program on
TOPOLOGY, STRATIFIED SPACES AND PARTICLE PHYSICS,
(with M. Banagl, Edward Bierstone, Sylvain Cappell and Timo Weigand)
Fields Institute, Toronto, Canada, August 826, 2016.

SINGULARITIES IN THE MIDWEST, IV,
(with Manuel Gonzalez Villa and Botong Wang)
University of WisconsinMadison, Madison, WI, March 1719, 2017.

WORKSHOP FOR YOUNG RESEARCHERS IN MATHEMATICS,
(with C. Cazacu, C. Costara, D. Ibadula, L. Ignat, A. Macinic, L. Paunescu, D. Stamate)
Institute of Mathematics of the Romanian Academy, Bucharest, Romania, May 1720, 2017.

SINGULARITY THEORY CONFERENCE,
(with Rong Du and Yun Gao)
East China Normal University, Shanghai, China, July 1014, 2017.
 Oberwolfach MiniWorkshop:
INTERACTIONS BETWEEN LOWDIMENSIONAL TOPOLOGY AND COMPLEX ALGEBRAIC GEOMETRY,
(with Stefan Friedl and Alex Suciu)
Oberwolfach, Germany, October 2228, 2017.

SINGULARITIES IN THE MIDWEST, V,
(with Botong Wang)
University of WisconsinMadison, Madison, WI, March 2324, 2018.

WORKSHOP FOR YOUNG RESEARCHERS IN MATHEMATICS,
(with C. Cazacu, I. Cimpean, C. Costara, N. Costea, D. Ibadula, L. Ignat, A. Macinic, D. Stamate)
Institute of Mathematics of the Romanian Academy, Bucharest, Romania, May 1718, 2018.
 Special Session on
SINGULARITIES IN GEOMETRY, TOPOLOGY AND ALGEBRA at the
Joint International Meeting of the American Mathematical Society and the Chinese Mathematical Society,
(with Rong Du, Yongqiang Liu and Botong Wang)
Fudan University, Shanghai, China, June 1114, 2018.

SINGULARITIES IN THE MIDWEST, VI,
(with Botong Wang)
University of WisconsinMadison, Madison, WI, March 1516, 2019.
 AMS Special Session on
GEOMETRY AND TOPOLOGY OF SINGULARITIES at the
Fall Central Sectional Meeting,
University of WisconsinMadison, Madison, WI, September 1415, 2019.

SINGULARITIES IN THE MIDWEST, VII, CANCELLED
(with Botong Wang)
University of WisconsinMadison, Madison, WI, March 2021, 2020.

SUZHOU WORKSHOP ON GEOMETRY, COMBINATORICS AND REPRESENTATION THEORY, POSTPONED
(with Yi Gu, Yongqiang Liu and Botong Wang)
Soochow University, Suzhou, China, July 69, 2020.

SINGULARITIES IN THE MIDWEST (online edition),
(with Eva Elduque, Moisés Herradón Cueto, Botong Wang)
University of WisconsinMadison, Madison, WI, May 1014, 2021.

TIBAR60 Conference, celebrating Mihai Tibăr's 60th anniversary (online)
(with Cezar Joița)
University of WisconsinMadison, Madison, WI, September 1011, 2021.

SINGULARITIES IN THE MIDWEST, VIII
University of WisconsinMadison, Madison, WI, March 913, 2023.
 AMS Special Session on
SINGERHOPF CONJECTURE IN GEOMETRY AND TOPOLOGY at the
Spring Southeastern Sectional Meeting,
(with Luca Di Cerbo)
Georgia Institute of Technology, Atlanta, GA,
March 1819, 2023.

ALGEBRAIC AND TOPOLOGICAL INTERPLAY OF ALGEBRAIC VARIETIES, celebrating the 60th Birthday of Enrique Artal and the 55th Birthday of Alejandro Melle
(with J.I. Cogolludo, F. Delgado, M. González Villa, M. Izquierdo, M. Pe Pereira, H. Tokunaga)
Jaca, Spain, June 1217, 2023.

GEOMETRY, TOPOLOGY AND ALGEBRA OF SINGULAR SPACES, celebrating the 70th anniversary of Prof. Alex Suciu and Prof. Laurențiu Păunescu
(with Radu Popescu, Mihai Tibăr)
Institute of Mathematics of the Romanian Academy, Bucharest, Romania, July 711, 2023.
 Special Session on
GEOMETRY AND TOPOLOGY OF ALGEBRAIC VARIETIES at the
The Tenth Congress of Romanian Mathematicians,
(with Radu Popescu, Mihai Tibar)
Pitesti, Romania, June 30  July 5, 2023.

SUZHOU WORKSHOP ON MATROID THEORY,
(with Yi Gu, Yongqiang Liu and Botong Wang)
Soochow University, Suzhou, China, July 812, 2024.

CHARACTERISTIC CLASSES OF SINGULAR SPACES, celebrating the 60th anniversary of Prof. Jörg Schürmann,
(with Yifeng Liu, Yongqiang Liu, Botong Wang and Lei Wu)
Zhejiang University, Hangzhou, China, August 59, 2024.
 STRUCTURES ON SINGULAR SPACES THROUGH THE LENS OF CHARACTERISTIC CLASSES, celebrating the 60th anniversary of Prof. Jörg Schürmann,
(with Markus Banagl)
Heidelberg University, Heidelberg, Germany, September 1620, 2024.
 Special Session on
SINGULARITIES at the
Joint meeting of the NZMS, AustMS and AMS,
(with Laurentiu Paunescu)
University of Auckland, New Zeeland, December 913, 2024.