Slides from Talks
(These top files, starting from October 2007, are full-color slideshows.)
- Enumerating simplicial spanning trees of shifted and color-shifted complexes, using simplicial effective resistance.
- Algebra seminar, New Mexico State University (online).
February 28, 2022.
- Slides (full-color slideshow)
.pdf
- The corresponding paper has not yet been written.
- Enumerating simplicial spanning trees of shifted and color-shifted complexes, using simplicial effective resistance.
- AMS Central Sectional Meeting, online (formerly University of Creighton),
October 9, 2021.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Counting topologies of holomorphic polynomial fields with simple zeros
- 31 Semana Nacional de Investigación y Docencia en Matematicás, Universidad de Sonora,
May 27, 2021.
- Slides (full-color slideshow)
.pdf
- The corresponding paper has not yet been written.
- What is 00, and who decides, and why does it
matter?: The role of definitions in mathematics
- STEMERS (STEM Education Research Seminar), Dept. of Teacher Education, UTEP (online).
November 13, 2020.
- A non-partitionable Cohen-Macaulay simplicial complex
- 30 Semana Nacional de Investigación y Docencia en Matematicás, Universidad de Sonora,
March 2, 2020.
- Slides (full-color slideshow)
.pdf
- See also "A non-partitionable Cohen-Macaulay simplicial complex" on my preprint/reprints page
- Counting topologies of metric holomorphic polynomial field with simple zeros
- AMS Southeastern Sectional Meeting, University of Florida,
November 2, 2019.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Counting topologies of metric holomorphic polynomial field with simple zeros
- Discrete Geometry and Algebraic Combinatorics Conference, University of Texas Rio Grande Valley,
September 25, 2019.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Matroids and statistical dependency
- Combinatorics and Geometry seminar, University of Washington,
June 5, 2019.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Matroids and statistical dependency
- Discrete Math seminar, Texas State University,
March 2, 2018.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Weighted enumeration of spanning trees of complete colorful complexes and skeletons of hypercubes
- Algebra seminar, Texas State University,
March 1, 2018.
- Slides (full-color slideshow):
.pdf
- See also "A weighted cellular matrix-tree theorem, with applications to complete colorful and cubical complexes" on my preprint/reprints page
- Matroids and statistical dependency
- CombinaTexas, Texas A&M University,
February 11, 2018.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Matroids and statistical dependency
- Joint Mathematics Meeting, San Diego,
January 12, 2018.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Bioinformatics-themed projects in Discrete Mathematics
- Joint Mathematics Meeting, San Diego,
January 10, 2018.
- Matroids and statistical dependency
- AMS Central Sectional Meeting, University of North Texas,
September 9, 2017.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- A non-partitionable Cohen-Macaulay simplicial complex, and implications for Stanley depth
- Mathematical Congress of the Americas (Special Session on Combinatorial Commutative Algebra), McGill University,
July 28, 2017.
- Slides (full-color slideshow)
.pdf
- See also "A non-partitionable Cohen-Macaulay simplicial complex" on my preprint/reprints page
- A non-partitionable Cohen-Macaulay simplicial complex
- Mathematical Congress of the Americas (Special Session on Geometry and Combinatorics of Cell Complexes), McGill University,
July 27, 2017.
- Slides (full-color slideshow)
.pdf
- See also "A non-partitionable Cohen-Macaulay simplicial complex" on my preprint/reprints page
- A non-partitionable Cohen-Macaulay simplicial complex
- Departmental Colloquium, New Mexico State University,
March 16, 2017.
- Slides (full-color slideshow):
.pdf
- See also "A non-partitionable Cohen-Macaulay simplicial complex" on my preprint/reprints page
- Metric polyhedral complexes
- AMS Central Sectional Meeting, University of St. Thomas,
October 29, 2016.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- A non-partitionable Cohen-Macaulay simplicial complex
- Discrete Geometry and Algebraic Combinatorics Conference, University of Texas Rio Grande Valley,
May 4, 2016.
- Slides (full-color slideshow):
.pdf
- See also "A non-partitionable Cohen-Macaulay simplicial complex" on my preprint/reprints page
- A non-partitionable Cohen-Macaulay simplicial complex
- Discrete Mathematics Seminar, University of Colorado Denver,
March 4, 2016.
- Slides (full-color slideshow):
.pdf
- See also "A non-partitionable Cohen-Macaulay simplicial complex" on my preprint/reprints page
- A non-partitionable Cohen-Macaulay simplicial complex, and implications for Stanley depth
- Southwest Local Algebra Meeting [SLAM], Texas State University,
February 28, 2016.
- Slides (full-color slideshow):
.pdf
- See also "A non-partitionable Cohen-Macaulay simplicial complex" on my preprint/reprints page
- Weighted tree enumeration of cubical complexes
- Joint Mathematics Meetings, Seattle,
January 9, 2016.
- Slides (full-color slideshow):
.pdf
- video!
- See also "A weighted cellular matrix-tree theorem, with applications to complete colorful and cubical complexes" on my preprint/reprints page
- A non-partitionable Cohen-Macaulay simplicial complex
- Departmental Colloquium, University of Texas at El Paso,
April 24, 2015.
- Slides (full-color slideshow):
.pdf
- See also "A non-partitionable Cohen-Macaulay simplicial complex" on my preprint/reprints page
- Equivalence relations in mathematics, K-16+
- MAA Southwestern Sectional Meeting, El Paso Community College,
April 19, 2015.
- Slides (full-color slideshow):
.pdf
- The surprising similarity of shifted simplicial complexes and matroids
- Stanley@70, MIT,
June 24, 2014.
- Slides (full-color slideshow):
.pdf
- See also "A Relative Laplacian Spectral Recursion" on my preprint/reprints page
- Weighted spanning tree enumerators of color-shifted complexes
- CombinaTexas, Texas A&M University,
April 19, 2014.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Weighted spanning tree enumerators of color-shifted complexes
- AMS Central Sectional Meeting, Washington University in St. Louis,
October 20, 2013.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Equivalence relations in mathematics, K-16+
- AMS Southeastern Sectional Meeting, University of Louisville,
October 5, 2013.
- Slides (full-color slideshow):
.pdf
- Weighted spanning tree enumerators of complete colorful complexes
- CombinaTexas, University of Houston-Downtown,
April 21, 2013.
- Slides (full-color slideshow):
.pdf
- See also "A weighted cellular matrix-tree theorem, with applications to complete colorful and cubical complexes" on my preprint/reprints page
- Weighted spanning tree enumerators of complete colorful complexes
- 13th Joint UTEP/NMSU Workshop on Mathematics, Computer
Science, and Computational Sciences, New Mexico State University,
April 6, 2013.
- Slides (full-color slideshow):
.pdf
- See also "A weighted cellular matrix-tree theorem, with applications to complete colorful and cubical complexes" on my preprint/reprints page
- Weighted spanning tree enumerators of complete colorful complexes
- AMS Southeastern Sectional Meeting, University of Mississippi,
March 2, 2013.
- Slides (full-color slideshow):
.pdf
- See also "A weighted cellular matrix-tree theorem, with applications to complete colorful and cubical complexes" on my preprint/reprints page
- Max flow min cut in higher dimensions
- Joint Mathematics Meetings, San Diego,
January 12, 2013.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Max flow min cut in higher dimensions
- 12th Joint UTEP/NMSU Workshop on Mathematics, Computer
Science, and Computational Sciences, University of Texas at El Paso,
October 27, 2012.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- Cuts and flows in cell complexes
- CombinaTexas, Southwestern University,
April 22, 2012.
- Slides (full-color slideshow):
.pdf
- See also "Cuts and flows of cell complexes" on my preprint/reprints page.
- Cuts and flows in cell complexes, I: Topology and vector space bases
- AMS Regional Meeting, University of Kansas,
March 31, 2012.
- Slides (full-color slideshow):
.pdf
- See also "Cuts and flows of cell complexes" on my preprint/reprints page.
- Spanning trees and the critical group of simplicial complexes
- Mathematics Colloquium, New Mexico State University,
October 20, 2011.
- Slides (full-color slideshow):
.pdf
- See also "Simplicial matrix-tree theorems" and "Critical groups of simplicial complexes" on my preprint/reprints page.
- Critical groups of simplicial complexes
- Formal Power Series and Algebraic Combinatorics,
June 17, 2011.
- Slides (full-color slideshow):
.pdf
- See also "Critical groups of simplicial complexes" on my preprint/reprints page.
- Spanning trees and the critical group of simplicial complexes
- Mathematics Seminar, Reed College,
April 28, 2011.
- Slides (full-color slideshow):
.pdf
- See also "Simplicial matrix-tree theorems" and "Critical groups of simplicial complexes" on my preprint/reprints page.
- The G-Shi arrangement, and its relation to G-parking functions
- CombinaTexas, Sam Houston State University,
April 16, 2011.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- The G-Shi arrangement, and its relation to G-parking functions
- 9th Joint UTEP/NMSU Workshop on Mathematics, Computer
Science, and Computational Sciences, New Mexico State University,
April 2, 2011.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- The Importance of being Equivalent:
The Ubiquity of equivalence relations in mathematics, K-16+
- Math Education Seminar, University of Kentucky,
March 31, 2011.
- Slides (full-color slideshow):
.pdf
- Spanning trees and the critical group of simplicial complexes
- Discrete CATS Seminar, University of Kentucky,
March 30, 2011.
- Slides (full-color slideshow):
.pdf
- See also "Simplicial matrix-tree theorems" and "Critical groups of simplicial complexes" on my preprint/reprints page.
- The G-Shi arrangement, and its relation to G-parking functions
- Joint Mathematics Meetings, New Orleans,
January 8, 2011.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- The Critical group of a simplicial complex
- AMS Regional Meeting, University of Notre Dame,
November 7, 2010.
- Slides (full-color slideshow):
.pdf
- See also "Critical groups of simplicial complexes" on my preprint/reprints page.
- Variations on a G-theme: The G-Shi arrangement, and its relation to G-parking functions
- Mathematics Colloquium, Texas A&M University at Galveston,
September 10, 2010.
- Slides (full-color slideshow):
.pdf
- The corresponding paper has not yet been written.
- The Critical group of a simplicial complex
- CombinaTexas, Texas State University,
April 24, 2010.
- Slides (full-color slideshow):
.pdf
- See also "Critical groups of simplicial complexes" on my preprint/reprints page.
- Combinatorial Laplacians
- Southeast Texas Discrete Math & Applications Workshop,
Texas A&M University at Galveston,
October 10, 2009.
- Spanning trees and Laplacians of cubical complexes
- CombinaTexas, University of Houston, April 2009.
- Slides (full-color slideshow):
.pdf
- See also "Cellular spanning trees and Laplacians of cubical complexes" on my preprint/reprints page
- Simplicial spanning trees
- 4th Joint UTEP/NMSU Workshop on Mathematics, Computer
Science, and Computational Sciences, November 2008.
- Slides (full-color slideshow):
.pdf
- See also "Simplicial matrix-tree theorems" on my preprint/reprints page
- Simplicial spanning trees
- Discrete Mathematics & Representation Theory Seminar, University of California at Davis, May 2008.
- Slides (full-color slideshow):
.pdf
- See also "Simplicial matrix-tree theorems" on my preprint/reprints page
- A Simplicial matrix-tree theorem, II. Examples
- AMS Regional Meeting, DePaul University, October 2007.
- Slides (full-color slideshow):
.pdf
- See also "Simplicial matrix-tree theorems" on my preprint/reprints page
(Note: Every set of "overlays" of these following older talks has been combined into a single slide,
and, obviously, hand-drawn colorings and other additions, especially
to pictures, are not included.)
- Counting weighted simplicial spanning trees of shifted complexes
- AMS Regional Meeting, Davidson College, March 2007.
- Counting weighted simplicial spanning trees of shifted complexes
- CombinaTexas, Texas A&M University, February 2007.
- Matroid Steiner complexes are Laplacian integral
- AMS Regional Meeting, Bard College, October 2005.
- Slides:
.dvi
.ps
.pdf
- The corresponding paper has not yet been written
- Eigenvalues of combinatorial Laplacians
- MAA Regional Meeting, University of Texas at El Paso, April 2005.
- A Relative Laplacian Spectral Recursion
- CombinaTexas, Texas State University, San Marcos, February 2005.
- A Relative Laplacian Spectral Recursion
- Richard Stanley 60th Birthday Conference, MIT, June 2004.
- Port Complexes and the Laplacian Spectral Recursion
- CombinaTexas, Texas A&M University, April 2004.
- Slides:
.dvi
.ps
.pdf
- The corresponding paper has not yet been written
- Shifted Simplicial Complexes and Algebraic Shifting
- AMS Regional Meeting, Binghamton University, October 2003.