Ryan R. Martin I am a professor at Iowa State University and currently a Scott Hanna Professor. I am also Editor-in-Chief of the journal Order, published by Springer. My fields of interest are extremal poset theory, graph theory and extremal and probabilistic combinatorics. Click here: Slides from the Pittsburgh+Pirate Minisymposium Schedule on Randomly Perturbed (Hyper)graphs.
The discrete mathematics research cluster is partially supported by Research Training Grant (RTG) #1839918 from the National Science Foundation (NSF). My research is partially supported by a grant from the Simons Foundation (#709641, 2020-2025) I was a visitor of Maria Axenovich at the Karlsruhe Institute of Technology, Germany via the German Academic Exchange Service (DAAD) in 2020. I was a Fulbright US Scholar as part of the Budapest Semesters in Mathematics program at the Alfred Rényi Institute of Mathematics in 2019.
email address:   rymartin@iastate.edu website:   http://rymartin.name Phone#: 515-294-1282 DEPARTMENT OF MATHEMATICS 428 CARVER HALL 411 MORRILL ROAD AMES, IOWA 50011-2104 Current CV ISU Math Office#: 515-294-1752 Publications ISU Math Fax#: 515-294-5454 arXiv WebEx room: rymartin MathSciNet

Latest preprints: The endomorphism conjecture for graded posets of width 4, with M. Bóna, submitted. The maximum number of 10- and 12-cycles in a planar graph, with C. Cox, submitted. Counting paths, cycles and blow-ups in planar graphs, with C. Cox, submitted. Planar Turán number of the 6-cycle, with D. Ghosh, E. Gyõri, A. Paulos, and C. Xiao, submitted. On generalized Turán results in height two posets, with J. Balogh, D.T. Nagy, and B. Patkós, SIAM J. Discrete Math., to appear. Graph clustering via generalized colorings, with A. London and A. Pluhár, Theoret. Comput. Sci., to appear.

Counterexamples to a conjecture of Harris on Hall Ratio, with A. Blumenthal, B. Lidický, S. Norin, F. Pfender, and J. Volec, SIAM J. Discrete Math., 36(3) (2022). 1678--1686. [Journal Link] Accumulation points of the edit distance function, with C. Cox and D. McGinnis, Discrete Math., 345(7) (2022). Article 112857. (17pp.) [Journal Link]. On the edit distance function of the random graph, with A.W.N. Riasanovsky, Combin. Probab. Comput., 31(2) (2022), 345--367. [Journal Link]. Powers of Hamiltonian cycles in mulitipartite graphs, with L. DeBiasio and T. Molla, Discrete Math., 345(4) (2022), Article 112747. (17pp.) [Journal Link]. Large monochromatic components of small diameter, with E. Carlson, B. Peng, and M. Ruszinkó, J. Graph Theory, 99(2) (2022), pp. 247--250. [Journal Link]. Splits with forbidden subgraphs, with M. Axenovich, Discrete Math., 345(2) (2022), Article 112689. (8pp.) [Journal link]

Induced and non-induced poset saturation problems, with B. Keszegh, N. Lemons, D. Pálvölgyi, B. Patkós, J. Combin. Theory Ser. A, 184 (2021), Article 105497 [Journal Link]. The maximum number of paths of length four in a planar graph, with D. Ghosh, E. Gyõri, A. Paulos, N. Salia, C. Xiao, and O. Zamora, Discrete Math., 344(5) (2021), Article 112317 [Journal Link].

Teaching: Fall 2022: M304: Combinatorics Time/Room: MWF 2:15-3:05/Carver 008 Textbook: Brualdi, Introductory Combinatorics, 5th Edition Canvas:  https://canvas.iastate.edu

Other materials: Edit distance survey: The edit distance in graphs: methods, results and generalizations, Recent Trends in Combinatorics, 31--62, IMA Vol. Math. Appl., 159, Springer, Cham, 2016. [Errata] Lake Michigan Workshop slides: "The edit distance on graphs": Part I, Part II, Part III Current and former students. Discrete Math seminar page (maintained by Chris Cox).

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Fall Semester 2022: Aug 22 - Dec 09   M T W Θ F   [8] 7:45-8:35           8:00-9:15 [9] 8:50-9:40           9:30-10:45 [10] 9:55-10:45           Office Hours Carver 428 10:10-11:50 [11] 11:00-11:50     Office Hours Carver 428   11:00-12:15 [12] 12:05-12:55           12:30-1:45 [1] 1:10-2:00           [2] 2:15-3:05 M304: Combinatorics Carver 008 Discrete Mathematics Seminar Carver 401 2:10-3:00 M304: Combinatorics Carver 008   M304: Combinatorics Carver 008 2:10-3:25 [3] 3:20-4:10           3:40-4:55 [4] 4:25-5:15   Colloquium Carver TBA 4:10-5:00

Fri Feb 04 Online Meeting Zoom Fri Feb 11 Algebra and Combinatorics Seminar talk Texas A&M University [Virtual] Fri Feb 25 Discrete Mathematics Seminar talk University of South Carolina, Columbia, SC Sat-Sun Mar 12-13 AMS Eastern Section Meeting #1175 Special Session on Structural and Extremal Graph Theory Charlottesville, VA CANCELLED Sat-Sun Mar 12-13 not-AMS Meeting on Structural and Extremal Graph Theory Virtual Mon-Wed Mar 28-30 Visit from Miklós Bóna, University of Florida Iowa State University Mon-Wed Apr 04-06 Visit from Anton Bernshteyn, Georgia Institute of Technology Iowa State University Sun-Thu Apr 10-14 Visit from Balázs Patkós, Rényi Institute for Mathematics Iowa State University Sat-Sun May 14-15 AMS Western Section Meeting #1178 Special Session on Enumerative and Extremal Problems in Chromatic Graph Theory Virtual [Formerly at University of Colorado, Denver, CO] Tue May 17 Combinatorial Meeting of Prairie & Sky Virtual Tue-Thu Jun 14-16 SIAM Conference on Discrete Mathematics (DM22) Minisymposium on Randomly Perturbed (Hyper)graphs Carnegie Mellon University, Pittsburgh, PA Fri Jun 17 Pirate Session on Randomly Perturbed (Hyper)graphs Zoom Mon-Fri Jul 24-Aug 05 Graduate Research Workshop in Combinatorics (GRWC) Denver, CO Mon-Fri Aug 01-05 Random Structures and Algorithms Gniezno, Poland Thu-Sat Aug 18-20 Mathematics Qualifying Exams Iowa State University Mon Aug 22 First day of classes Iowa State University Mon Sep 05 No classes: Labor Day Iowa State University Mon-Wed Sep 26-28 Visit from Addisu Paulos, University of Addis Ababa Iowa State University Sat-Sun Oct 22-23 AMS Western Section Meeting #1182 Special Session on Extremal Graph Theory Salt Lake City, UT Registration: $20 Students, $92 Members, $165 Non-members Sat-Sun Apr 01-02, 2023 AMS Virtual Section Meeting #1185 Virtual Registration: $10 Students, $25 Members, $75 Non-members April 2023 Visit from Addisu Paulos, University of Addis Ababa Iowa State University Mon-Thu Jun 05-08 CanaDAM 2023 Winnipeg, Manitoba, Canada

Legend: Classroom Meeting Office Occasional Event

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Ryan Martin's Web Page / Revised 04 August 2022.