Publications and presentations



Universidad Nacional de Colombia, Bogotá

Yu Takeuchi (404), building.  

Office: 328.

Phone number (+601)3165000 Ext.13178

Welcome to my homepage. I'm an associate professor at the Department of Mathematics of the Universidad Nacional de Colombia.  (Maybe you are looking for the "real" José L. Ramírez?

Research interests: Enumerative Combinatorics and Discrete Mathematics

Research Group: DiscreMath: Matemáticas Discretas y Ciencias de la Computación

Seminario DiscreMath 2023-II

What's new?

(04/2024) During the 20th International Conference on Fibonacci Numbers and Their Applications (2022) , Brian Hopkins talked about Arndt compositions, and proved  several interesting properties using combinatorial arguments. Now, jointly with Daniel Checa, we have obtained several beautiful and new results using generating functions! (see our paper in INTEGERS).

(03/2024) With Rigo, we introduced both symmetric and asymmetric statistic in Dyck paths. Now, in collaboration with Jean-Luc, we have investigated this interesting parameter in Dyck paths with air pocktes.  Our results have been published in the paper titled Symmetries in Dyck paths with air pockets (in Aequationes Mathematice).

(02/2024) We have completed our study on classical and consecutive pattern avoidance in Catalan words:

Upcoming Talks and Meetings

International Conference on Enumerative Combinatorics and Applications ICECA 2024, Aug. 26-28, 2024 (online) web

GASCom 2024. Random Generation of Combinatorial Structures. Polyominoes and Tilings. France, Jun. 24-28, 2024. (web)

9th International Symposium on Riordan Arrays and Related Topcis. Washington, Jun. 3-5, 2024.   (web)

VIII Encuentro Colombiano de Combinatoria. ECCO 2024, Jun. 17-28, 2024 (Popayan, Colombia), web

Círculos Matemáticos UN 2024-I  (web)