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, to appear. [Journal Link]

Planar Turán number of the 6-cycle, with D. Ghosh, E. Gyõri, A. Paulos, and C. Xiao, 36(3) (2022), 2028--2050. [Journal Link] On generalized Turán results in height two posets, with J. Balogh, D.T. Nagy, and B. Patkós, SIAM J. Discrete Math., 36(2) (2022), 1483--1495. [Journal Link] Graph clustering via generalized colorings, with A. London and A. Pluhár, Theoret. Comput. Sci., 918 (2022), 94--104. [Journal Link] 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   Honors Meeting (JTB) Carver 428 9:00-9:40       9:30-10:45 [10] 9:55-10:45 [RTG Rotation Class: Carver 401] Alt. Research Meeting (EG-L) Carver 428 9:55-10:45 [RTG Rotation Class: Carver 401] Research Meeting (EG-L) Carver 428   [RTG Rotation Class: Carver 401] [11] 11:00-11:50 RTG Comm. Meeting Zoom Research Meeting (EH) Carver 428 Office Hours Carver 428   Office Hours Carver 428 11:00-12:40 11:00-12:15 [12] 12:05-12:55 Research Meeting (CC) Carver 428   Research Meeting (NV) Carver 428   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 205 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 Fri-Fri Oct 07-21 Visit from Maria Axenovich, Karlsruhe Institute of Technology 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 Tue-Fri Oct 25-28 Visit from Addisu Paulos, University of Addis Ababa Iowa State University 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 02 September 2022.