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: On the rainbow planar Turán number of paths, with E. Gyõri, A. Paulos, C. Tompkins, and K. Varga, submitted. 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, J. Graph Theory, 101(3) (2022), 521--558. [Journal Link] Planar Turán number of the 6-cycle, with D. Ghosh, E. Gyõri, A. Paulos, and C. Xiao, SIAM J. Discrete Math., 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).

Spring Semester 2023: Jan 17-Mar 10, Mar 20-May 05   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 M304: Enumerative Combinatorics and Partially Ordered Sets Carver 190   M304: Enumerative Combinatorics and Partially Ordered Sets Carver 190   M304: Enumerative Combinatorics and Partially Ordered Sets Carver 190 [11] 11:00-11:50 RTG Comm. Meeting Zoom   Office Hours Carver 428   Research Meeting (EG-L) Carver 428 11:00-12:15 [12] 12:05-12:55           12:30-1:45 [1] 1:10-2:00 M595: RTG Rotation Carver 401   M595: RTG Rotation Carver 401   M595: RTG Rotation Carver 401 [2] 2:15-3:05 Office Hours Carver 428 Discrete Mathematics Seminar Carver 401 2:10-3:00 Research Meeting (NV) Carver 428   Office Hours Carver 428 2:10-3:25 [3] 3:20-4:10           3:40-4:55 [4] 4:25-5:15   Colloquium Carver 268 4:10-5:00

Feb 04 Online Meeting Zoom Feb 11 Algebra and Combinatorics Seminar talk Texas A&M University [Virtual] Feb 25 Discrete Mathematics Seminar talk University of South Carolina, Columbia, SC Mar 12-13 AMS Eastern Section Meeting #1175 Special Session on Structural and Extremal Graph Theory Charlottesville, VA CANCELLED Mar 12-13 not-AMS Meeting on Structural and Extremal Graph Theory Virtual Mar 28-30 Visit from Miklós Bóna, University of Florida Iowa State University Apr 04-06 Visit from Anton Bernshteyn, Georgia Institute of Technology Iowa State University Apr 10-14 Visit from Balázs Patkós, Rényi Institute for Mathematics Iowa State University 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] May 17 Combinatorial Meeting of Prairie & Sky Virtual Jun 14-16 SIAM Conference on Discrete Mathematics (DM22) Minisymposium on Randomly Perturbed (Hyper)graphs Carnegie Mellon University, Pittsburgh, PA Jun 17 Pirate Session on Randomly Perturbed (Hyper)graphs Zoom Oct 22-23 AMS Western Section Meeting #1182 Special Session on Extremal Graph Theory University of Utah, Salt Lake City, UT Nov 11-16 Visit from Addisu Paulos, University of Addis Ababa Iowa State University Nov 23-Dec 12 Visit from Maria Axenovich, Karlsruhe Institute of Technology Iowa State University Sat-Sun Mar 18-19, 2023 AMS Southeastern Section Meeting #1184 Special Session on Recent Trends in Structural and Extremal Graph Theory Georgia Institute of Technology, Atlanta, GA 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 Thu-Sat Jun 08-17, 2023 June 08-10: International Conference in Discrete Mathematics (ICDM 2023) June 15-17: Workshop on Combinatorial Methods in Graph Theory Vidyavardhaka College of Engineering, Mysore, India Presidency University, Bengaluru, India Mon-Thu Jun 05-08, 2023 CanaDAM 2023 Winnipeg, Manitoba, Canada Mon-Fri Jun 12-16, 2023 21st International Conference on Random Structures and Algorithms Pittsburgh, PA Mon-Fri Jul 31-Aug 04, 2023 Focused Workshop on Saturation in the Forbidden Subposet Problem Erdős Center, Budapest, Hungary

Legend: Classroom Meeting Office Occasional Event

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Ryan Martin's Web Page / Revised 13 December 2022.