215. UNC-Greensboro (Colloquium): Algebra for geometric data. 13 April 2018

214. Oberwolfach, Germany: Stratified spaces, fly wings, and multiparameter persistent homology. 25 January 2018

213. Ohio State (Young Mathematicians Conference): Topology for statistical analysis of brain artery images. 12 August 2017

212. Banff (BIRS): What is a QR code? 1 August 2017

211. Banff (BIRS): What is a barcode for persistent homology with multiple parameters? 31 July 2017

210. Montréal (Math Congress of the Americas): Algebraic data structures for topological summaries. 27 July 2017

209. Duke (SWiM, for high-school girls): Topology for statistical analysis of brain artery images. 23 June 2017

208. Toronto (CanaDAM): Fruit fly wing veins as embedded planar graphs. 13 June 2017

207. Max Planck, Leipzig (Algebra & the Sciences): Algebra for topology in biology and statistics. 27 May 2017

206. Florida State (Alg & Apps): Algebraic data structures for topological summaries. 26 January 2017

205. NC State (AMS): Data structures for real multiparameter persistence. 12 November 2016

204. U. Florida (Informatics Institute): Lessons in topology from statistics of brain arteries. 10 November 2016

203. U. Florida (Math Colloquium): Algebraic data structures for topological summaries. 9 November 2016

202. Columbus, Ohio (MBI): Data structures for real multiparameter persistence. 12 September 2016

201. Moieciu de Sus, Romania (EMS Summer School, 5 lecture hours): Real applied multigraded commutative algebra. 18-24 August 2016

200. Herstmonceux, England (Alg. Combin. & Group Actions): Poset encodings of modules with actions of real cones. 14 July 2016

199. Duke (SWiM, for high-school girls): Topology for statistical analysis of brain artery images. 14 June 2016

198. Cortona, Italy (Bruns 70th): Homological algebra for real multigraded modules. 2 June 2016

197. Albuquerque, NM (SIAM Imaging Science): Effective algebra and geometry for images with varied topology. 24 May 2016

196. U. Wisconsin (Applied Algebra Days 3): Data structures for real multiparameter persistence. 1 May 2016

195. U. Minnesota (Math Colloquium): Interactions between topology, biology, and imaging. 3 December 2015

194. U. Minnesota (Commutative Algebra): Irreducible decomposition of binomial ideals. 3 December 2015

193. NC State (Algebra & Combinatorics): Multigraded modules from fruit flies. 23 November 2015

192. Texas A&M (Algebra & Combinatorics): Multigraded modules from fruit flies. 20 November 2015

191. Texas A&M (Math Colloquium): Lessons in topology from statistics of brain arteries. 19 November 2015

190. Clemson (AG/NT + Applied Discrete Math): Multigraded moduli from fruit flies. 3 November 2015

189. SAMSI (Undergrad Workshop): Topology for statistical analysis of brain artery images. 20 October 2015

188. UNC-Greensboro (Helen Barton Lecture Series): Persistent homology for biological images. 28 September 2015

187. Oxford, UK: Biological applications of persistent homology: interactions with statistics, geometry, and algebra. 11 September 2015

186. Osaka, Japan (Trends in Gröbner bases): Multigraded moduli from fruit flies via stratified space statistics. 7 July 2015

185. U. Chicago (Conference on Geometry & Data): Persistent interactions between biology, topology, and statistics. 9 June 2015

184. NC State (Grad Math Workshop): Applying persistent homology to brain artery and vein imaging. 21 March 2015

183. Duke (MathBio Colloquium): Applying persistent homology to brain artery and vein imaging. 30 January 2015

182. San Antonio (JMM): Persistent homology analysis of brain artery trees (short slides or long slides). 11 January 2015

181. Athens, GA (UGA Stat, fMRI group): Applying persistent homology to brain artery and vein imaging (slides here). 12 November 2014

180. Oberwolfach, Germany: Topological definition of sticky means in arbitrary metric spaces. 3 October 2014

179. Winthrop U.: Topology for statistical analysis of brain artery images. 27 June 2014

178. Chicago, IL (Algebraic Statistics @ IIT): Applying persistent homology to brain artery and vein imaging. 20 May 2014

177. Green Hope High School (AP Stat classes): Topology for statistical analysis of brain artery images. 15 May 2014

176. Durham, NC (LDHD Transition @ SAMSI): Topological analysis of geometrically stratified data. 12 May 2014

175. Duke (Noyce Learning Conference): Topology for statistical analysis of brain artery images. 11 April 2014

174. Göttingen, Germany (Stochastics Colloquium): Applying persistent homology to brain artery imaging. 10 March 2014

173. Ulm, Germany (GPSD Section speaker): Asymptotics of sampling from topologically stratified spaces. 4 March 2014

172. Halifax, NS (Combin Alg meets Alg Combin): Binomial irreducible decomposition. 25 January 2014

171. Columbia, SC (CommAlg in the SE): Binomial irreducible decomposition. 9 November 2013

170. Philadelphia, PA (AMS): Binomial irreducible decomposition. 12 October 2013

169. Luminy, France (CIRM): Binomial irreducible decomposition. 9 July 2013

168. Boston, MA (Zelevinsky memorial): How do quivers and stratifications apply to biology? 27 April 2013

167. U. Arizona (math colloquium): Geometric statistics on stratified spaces. 7 March 2013

166. U. Arizona (Probability seminar): Sticky central limit theorems at singularities. 6 March 2013

165. UNC Chapel Hill (math colloquium): Biological applications of geometric statistics on stratified spaces. 14 February 2013

164. NC State (SUM Series): Statistics without addition or division. 6 February 2013

163. Berkeley, CA (MSRI): Alexander duality and total positivity. 7 December 2012

162. Sandbjerg, Denmark: Geometry for samples of metric branched structures. 11 October 2012

161. Duke Postdoc Services / School of Medicine panel: NSF Funding from the Inside. 25 September 2012

160. Ohio State Combinatorics: Combinatorics and topology of fibers in total positivity. 25 May 2012

159. Columbus, Ohio (MBI): Sticky central limit theorems at singularities. 23 May 2012

158. Duke Data Seminar: Sticky central limit theorems at singularities. 24 April 2012

157. Wake Forest (AMS): Subword complexes and fibers of totally nonnegative parametrizations. 24 September 2011

156. Prague, Czech Rep.: Sticky central limit theorems at singularities. 15 August 2011

155. Miami Beach (JSM): Sticky central limit theorems at singularities. 4 August 2011

154. MSRI: How primary decomposition in commutative monoids is wrong. 9 June 2011

153. SAMSI: Stratified statistics for evolutionary biology. 30 April 2011

152. Rice U. (TAGS): Contractibility via subword complexes in the context of homogeneous spaces. 22-24 April 2011

151. Columbia, SC (CommAlg in the SE): How primary decomposition in commutative monoids is wrong. 18-20 March 2011

150. Georgia Southern (AMS meeting): Sticky central limit theorems on polyhedral spaces. 12-13 March 2011

149. George Mason math colloquium: Unfolding polyhedra. 18 February 2011

148. Oslo, Norway: Statistics on data sampled from stratified spaces. 14 January 2011

147. Duke MathBio colloquium: Statistics on spaces of phylogenetic trees. 3 December 2010

146. Duke Brown Bag seminar: Combinatorics of phylogenetic trees. 2 December 2010

145. Luminy, France: Decompositions of commutative monoid congruences and binomial ideals. 2 November 2010

144. İstanbul, Turkey (CIMPA-TÜBITAK): Five lectures: Decompositions of monoids and binomial ideals. 18-21 September 2010

143. NSA math colloquium: Unfolding convex polyhedra. 16 July 2010

142. Berkeley (AMS-SMM meeting): Face rings of simplicial complexes with singularities. 3 June 2010

141. MIT combinatorics seminar: Lattice point methods for combinatorial games. 12 May 2010

140. U. Maryland math colloquium: Unfolding convex polyhedra. 7 May 2010

139. Texas State (CombinaTexas): Lattice point methods for combinatorial games. 24-25 April 2010

138. George Mason (WCEIT): Lattice point methods for combinatorial games. 19-20 March 2010

137. Duke U. Algorithms: Unfolding convex polyhedra. 8 February 2010

136. Seville, Spain: Eight lecture-hours: Primary decomposition of binomial ideals. 25-31 January 2010

135. Duke U. Algebraic Geometry:

134. Duke U. (CTMS Retreat) Biological and chemical applications of polyhedral geometry and algebra. 23 October 2009

133. Raleigh, NC (SE Lie Theory): Equivariant transversality and

132. NC State (SUM Series): Unfolding polyhedra. 30 September 2009

131. Duke U. Algebraic Geometry: Combinatorics in cohomology of toric varieties. 23 September 2009

130. Duke U. Algebraic Geometry: What is a toric variety? 16 September 2009

129. Halifax, Nova Scotia (Games-At-Dal): Lattice games. 18-21 July 2009

-----. (canceled due to political unrest) IPM Tehran, Iran: Four lectures on binomial ideals. 20-30 June 2009

128. Voss, Norway (Abel Symposium): Combinatorial positivity via transversality in homogeneous spaces. 1-4 June 2009

127. Oberwolfach, Germany: Potential applications of commutative algebra to combinatorial game theory. 19-25 April 2009

126. Raleigh, NC (AMS meeting): Equivariant positivity via transversality in K-theory of G/P. 4-5 April 2009

125. Raleigh, NC (AMS meeting): Topological Cohen--Macaulay criteria for monomial ideals. 4-5 April 2009

124. Raleigh, NC (AMS meeting): Binomial ideals. 4-5 April 2009

123. MSRI, Berkeley: Equivariant transversality and K-theoretic positivity. 24 March 2009

122. Thessaloniki, Greece: Geometry of flags and permutations. 12 March 2009

121. Thessaloniki, Greece: Unfolding polyhedra. 11 March 2009

120. Ioannina, Greece: Unfolding polyhedra. 9 March 2009

119. UNC Chapel Hill colloquium: Positivity from transversality and transitivity 15 January 2009

118. U. Minnesota math colloquium: Transversality in homogeneous spaces. 11 December 2008

117. U. Minnesota Schubert seminar: Cohomology rings of flag and toric varieties. Friday 3, 10, 17 October 2008

116. U. Minnesota Combinatorics: Topological Cohen-Macaulay criteria for monomial ideals. Monday 29 September 2008

115. Mangalia, Romania: Cellular resolutions of multiplier ideals of sums. 31 May 2008

114. U. Minnesota Combinatorics: Combinatorics of Horn hypergeometric series. 22 April 2008

113. UC San Diego: Metric geometry and unfoldings of polyhedra. 21 February 2008

112. U. Minnesota Junior Colloquium: Unfolding convex polyhedra. 19 February 2008

111. UT Austin: Gröbner geometry of Schubert polynomials. 5 February 2008

110. Duke U.: Metric geometry and unfoldings of polyhedra. 31 January 2008

109. American Institute of Mathematics, Palo Alto: Nonoverlapping unfolding of polyhedra. 7 December 2007

108. U. Minnesota Math Club: Unfolding polyhedra. 25 October 2007

107. Rutgers (AMS meeting): Multiplier ideals of sums via cellular resolutions. 6 October 2007

106. Medellín, Colombia (Coloquio Latinoamericano de Álgebra): Hypergeometric series and toric algebra. 23-27 July 2007

105. Tianjin, China (FPSAC plenary speaker): Combinatorics of Horn hypergeometric series. 2-6 July 2007

104. CRM Montreal, Canada: A Kleiman-Bertini theorem for sheaf tensor products. 28 May - 1 June 2007

103. CRM Montreal, Canada: Five lecture-hours: Multivariate hypergeometric series and binomial ideals. 21-25 May 2007

102. U. Nebraska math colloquium: Unfolding polyhedra. 27 April 2007

101. Kansas U. math colloquium: Unfolding polyhedra. 26 April 2007

100. Kansas U. Combinatorics: Combinatorics of permutations from determinantal ideals. 25 April 2007

99. U. Nebraska Algebra: Multiplier ideals of sums via cellular resolutions. 23 April 2007

98. Michigan Geom. Rep. Theory: Overview of the Kazhdan-Lusztig conjecture via intersection cohomology. 11 April 2007

97. Oberwolfach, Germany: Cellular resolutions of multiplier ideals of sums. 2 February 2007

96. Indiana U. math colloquium: Combinatorics in convexity, cohomology, and complex analysis. 8 December 2006

95. Purdue Algebraic Geometry: Old mysteries about multivariate hypergeometric systems. 7 December 2006

94. Northeastern GASC: Horn hypergeometric systems and binomial D-modules. 9 November 2006

93. MIT Combinatorics: Hypergeometric series and binomial primary decomposition. 8 November 2006

92. U. Michigan Algebraic Geometry: Toric primary decomposition and hypergeometric series. 25 October 2006

91. Cincinnati, Ohio (AMS meeting plenary speaker): Unfolding polyhedra. 21-22 October 2006

90. Ann Arbor, Michigan (Ohio State-UMichigan Alg. Geom. Workshop): Binomial schemes. 14-15 October 2006

89. Constanţa, Romania: Nine lecture-hours: Multigraded commutative algebra. 25-30 September 2006

88. Lincoln, Nebraska (IMMERSE program): Three lecture-hours: Irreducible decomposition. 26-27 July 2006

87. Snowbird, Utah: Binomial D-modules and lattice point geometry. 10-16 June 2006

86. Luminy, France: Lattice basis ideals and Horn systems. 22-26 May 2006

85. ITCEP Family Fun Fair (interactive middle & high school presentation): Unfolding polyhedra. 25 March 2006

84. U. Minnesota Combinatorics: h-vectors of Gorenstein polytopes. 17 February 2006

83. Oberwolfach, Germany: Homological methods for hypergeometric families. 29 January - 4 February 2006

82. Taichung, Taiwan (AMS-TMS): Combinatorial positivity by degeneration. 14-18 December 2005

81. Reed College math colloquium: Unfolding polyhedra. 1 December 2005

80. U. Washington Combinatorics: Simplicial complexes whose facets are Young tableaux. 30 November 2005

79. U. Washington math colloquium: Unfolding polyhedra. 29 November 2005

78. Eugene, OR (AMS meeting): Duality of antidiagonals and pipe dreams. 12 November 2005

77. MIT Combinatorics: Tableau complexes. 2 November 2005

76. Lincoln, NE (AMS meeting): Encoding injective resolutions. 22 October 2005

75. UNAM, Mexico City: Three lectures on Gröbner geometry of quiver polynomials. 19-23 September 2005

74. Seattle (Algebraic Geometry Warmup Week): Combinatorial positivity in algebraic geometry. 22 July 2005

73. Lisbon, Portugal (workshop on D-modules): Homological methods for hypergeometric families. 13 July 2005

72. Snowbird, Utah: Three lectures on local cohomology in combinatorics. 19-28 June 2005

71. U. Texas, Austin math colloquium: Combinatorics in cohomology and convexity. 22 March 2005

70. UC Berkeley Rep. theory/geom/combin: Families of hypergeometric systems. 23 February 2005

69. U. Minnesota Combinatorics: Stanley's simplicial poset conjecture. 4 February 2005

68. Columbia U. math colloquium: Combinatorics from geometry. 20 January 2005

67. Michigan Combinatorics: Unfolding polytopes. 24 September 2004

66. Michigan State Colloquium: Combinatorial positivity by geometric degeneration. 23 September 2004

65. RIMS, Kyoto: Three lectures on Gröbner geometry of quiver polynomials. 11 - 13 August 2004

64. IAS/PCMI, Utah: Overview of geometric combinatorics, II. 12 July 2004

63. ICTP, Trieste: Four lectures on combinatorial commutative algebra. 31 May - 4 June 2004

62. Durham, NC (Duke Math Journal conference): Combinatorial positivity by geometric degeneration. 23 April 2004

61. Michigan Noncommutative algebra: Homological methods for hypergeometric families. 16 March 2004

60. Minnesota Geometry: Gelfand-Tsetlin patterns via toric degeneration of flag manifolds. February 2004

59. Binghamton, NY (AMS meeting): Unfolding convex polyhedral manifolds. October 2003

58. Seville, Spain (AMS-RSME): Positive combinatorial formulae for quiver polynomials. 19 June 2003

57. Germany (MEGA): Algorithms for graded injective resolutions and local cohomology over semigroup rings. 14 June 2003

56. UC Davis Combinatorics: Combinatorics of quiver polynomials. 24 April 2003

55. Stanford (Western Alg.Geom. Seminar): Combinatorial positivity of universal formulae in cohomology. 20 April 2003

54. Banff, Canada: Positive combinatorial formulas for quiver polynomials. 5 May 2003

53. Oberwolfach, Germany (Topological Combinatorics workshop): Unfolding polyhedra. April 2003

52. Banff, Canada: Minors in products of matrices. 1 April 2003

51. Northeastern Algebra: Quiver polynomials and Schubert varieties. March 2003

50. MIT Combinatorics: Combinatorics of quiver polynomials. March 2003

49. Davis, CA (BADMath Day): Unfolding polyhedra in many dimenions. 1 March 2003

48. UC Berkeley colloquium: Combinatorial positivity by geometric degeneration. 27 February 2003

47. Michigan Algebraic geometry: Positive formulae for quiver polynomials. January 2003

46. Texas Tech (Red Raider Mini-Symposium): Combinatorial positivity by orbit degeneration. November 2002

45. Northeastern U. (AMS meeting): Positivity of quiver cycles via deformation. October 2002

44. Berkeley, CA (MSRI Workshop on Commutative Algebra): Positivity via Gröbner degeneration. October 2002

43. Michigan Combinatorics: Gröbner geometry of Schubert polynomials. September 2002

42. MSRI Introductory workshop: Hilbert schemes of points in the plane. September 2002

41. Melbourne, Australia (FPSAC); 1 hour lecture: Gröbner geometry of Schubert polynomials. July 2002

40. Levico, Italy: Gröbner geometry of Schubert polynomials via determinantal ideals. June 2002

39. Albany colloquium: Determinants, permutations, and flags. April 2002

38. Columbia Algebraic Geometry: Gröbner geometry of flag varieties. 15 March 2002

37. U. Michigan Combinatorics: Subword complexes in Coxeter groups. March 2002

36. University of Minnesota Combinatorics: Words and subwords in symmetric groups. February 2002

35. San Diego (Joint meetings, AMS-MAA): Determinantal ideals and combinatorics of Schubert polynomials. January 2002

34. Cornell Algebra: Determinantal ideals and the combinatorics of Schubert polynomials. October 2001

33. George Washington U. Algebra: Embedding planar graphs in staircases to resolve monomial ideals. September 2001

32. George Washington U. colloquium: Geometry and combinatorics of flag manifolds via Gröbner bases. September 2001

31. Morelia, Mexico (AMS-SMM meeting): Embedding planar graphs in staircases. May 2001

30. UC Berkeley: Planar graphs in 3-dimensional staircases. May 2001

29. Harvard-MIT Algebraic Geometry: An open problem on determinantal loci. 24 April 2001

28. MIT: Subword complexes in Coxeter groups and applications to Schubert varieties. 16 February 2001

27. UMass Amherst (Valley Geometry Seminar): Gröbner geometry of formulae for Schubert polynomials. November 2000

26. MIT: Gröbner geometry of formulae for Schubert polynomials. September 2000

25. Toronto (AMS meeting): Gröbner geometry of formulae for (double) Schubert polynomials. September 2000

24. UC Berkeley workshop: Haiman's proof of the n! conjecture. August 2000

23. UC Berkeley Algebra: Gröbner bases for determinantal ideals and K-theory of flag manifolds. May 2000

22. Brown University: Monomial ideals and duality. January 2000

21. Guanajuato, Mexico (CIMAT): The Cech hull. December 1999

20. New Mexico State U. colloquium: The Alexander duality functors. November 1999

19. New Mexico State U. Monomial ideals seminar: Injective resolutions. November 1999

18. U. Utah (AMS Special Session): The Alexander duality functors. September 1999

17. UC Berkeley Algebra: Projective dimension versus support-regularity. September 1999

16. U. Kansas colloquium: Resolutions of monomial ideals. September 1999

15. U. Kansas Algebra seminar: The canonical Cech complex. September 1999

14. Essen, Germany: Alexander duality and local duality with monomial support. June 1999

13. Reed College colloquium: Algebra and topology with alphabet blocks. February 1999

12. UC Berkeley Grad Student Seminar: Combinatorial commutative algebra. February 1999

11. UC Berkeley: Generic and cogeneric monomial ideals. February 1999

10. U. Michigan: Cellular homology and duality in the study of monomial ideals. September 1998

9. MIT: Alexander duality for monomial ideals and their resolutions. September 1998

8. MSRI Summer Program: Three lectures on Alexander duality. August 1998

7. UC Berkeley: The cohull resolution. August 1998

6. RIMS, Kyoto: Alexander duality for arbitrary monomial ideals. April 1998

5. UC Berkeley Algebra: Degrees on graded modules. May 1997

4. Rutgers U. Algebra: Characterization of multiplicity functions of ideals. March 1997

3. UC Berkeley Abelian Varieties: Multiplying points on group schemes. November 1996

2. UC Berkeley Grad Student Seminar: Where is the geometry in schemes? October 1996

1. MSRI Summer Program: Gröbner bases over PIDs. July 1996