Overview Invited Speakers Registration Abstracts Conference Venue CommitteesConference Contacts




Riordan arrays have been introduced in 1991 by L. W. Shapiro, S. Getu, W. J. Woan and L. Woodson with the aim of defining a class of infinite lower triangular arrays with properties analogous to those of the Pascal triangle. Few years later, in 1994, R. Sprugnoli pointed out the importance of these matrices in the computation of combinatorial sums. Since then Riordan arrays have attracted, and continue to attract, much attention in the literature. In particular, the algebraic structure of these matrices, their relationship with the computation of combinatorial sums and many combinatorial applications have been studied over the years.

The first meeting on "Riordan Arrays and Related Topics" was held on August 6-9, 2014 in Seoul, South Korea, as one of eight invited minisymposiums in the 19th International Linear Algebra Society Conference (ILAS2014).

The second meeting will be held on July 14-16, 2015, in Lecco (on lake Como), Italy, and will be organized in honor of Lou Shapiro and Renzo Sprugnoli, in consideration of all their important contributions on the topic. The symposium will gather together researchers from all over the globe world to present some of their most important recent results on the theory and applications of Riordan arrays and the Riordan group.

The meeting will includes invited lectures (30 or 40 minutes) and contributed talks (20 minutes). The meeting also includes a social dinner and an excursion.



The general topic of the symposium is the theory and application of Riordan arrays. Its goal is to highlight the most salient trends in the field. Particular areas of interest include (but are not limited to) the algebraic structure of Riordan arrays, Riordan arrays and combinatorial sums, Sheffer matrices, Umbral Calculus, lattice paths theory, combinatorics of posets, lattices and words, and many other aspects of combinatorics and their relations with other parts of mathematics, computer science, physics and biology.

Invited Speakers
40 minutes lectures Emeric Deutsch, Polytechnic Institute of New York University, USA
Lou W. Shapiro, Howard University, USA
Renzo Sprugnoli, Università di Firenze, Italy


30 minutes lectures

Aoife Hennessy, Waterford Institute of Technology, Ireland
Hana Kim, National Institute for Mathematical Sciences, Korea

István MezöNanjing University of Information Science and Technology, China

Registration Fees
  • Early registration (ordinary): 130 Euro, from January 1st, 2015, to May 31, 2015
  • Early registration (students):  80 Euro, from January 1st, 2015, to May 31, 2015
  • Late registration (ordinary): 180 Euro, from June 1st, 2015, to June 31, 2015
  • Late registration (students): 120 Euro, from June 1st, 2015, to June 31, 2015
  • Accompanying persons: 30 Euro, for the social dinner (to be paid during the conference)

The registration fee also includes the coffee breaks and the social dinner.
The registration fee does not include the excursion (to be paid during the conference).


Guidelines for Registration
First step: Go to the main Registration Page, select the appropriate link to register and get the personal account which allows you to log in.
Second step: Fill out this form.
Third step: Log in using your personal account and go to the main Registration Page where you can pay the registration fee via credit card.


Cancellation policy
Participants who cancel their registration for the meeting by June 31, 2015, will be eligible to receive a 70% refund of fees paid. No refunds will be issued after this deadline.
Cancellation of registration must be notified by writing an e-mail to the Secretariat (Eventimate: eventi-dmat@polimi.it).
All refunds will be processed after the conference for administrative reasons, and all bank services charges and all administration fees will be deducted from all conference registration refunds.

Any registered delegate who does not submit a written cancellation notice and/or does not attend the conference is not eligible for any refund.

See also the Registration Info Page.
Guidelines for Submission of Abstracts
  • All abstracts must be submitted in English and should not exceed one page.
  • Download this LaTeX file template.
  • Use this file to generate your abstract.
  • Rename the resulting file with your last name.
  • Send this .tex and .pdf file to rart2015@polimi.it


Note to Authors
An email message will be sent to the corresponding author by May 4, 2015, with a report on the status of the submission (accepted or declined).
Accepted abstracts will be collected in a Book of Abstracts which will be available online and distributed at the meeting.


Important Dates
  • Submission period: from March 1st, 2015, to April 15, 2015.
  • Notification of acceptance: by May 4, 2015
  • Deadline Extension for Abstract Submission:
    The abstract submission deadline has been extended to April 30, 2015.
Conference Venue
Venue Location Politecnico di Milano, Campus Lecco
Via Antonio Ghislanzoni 24 (or Via Gaetano Previati 1/c)
23900 Lecco, Italy.

Room B.2.2 (second floor), building 9.




How to reach the conference venue from Lecco railway station:

Bus: walk to Via Montello, take the bus 8, direction Germanedo, Via Amendola - La Piccola; walk 100 meters to destination.
Walk (1.1 km or 1 mi, ~17 min.): take Via Salvatore Sassi, Via Marco D'Oggiono, Via Digione to Via Giovanni Amendola; then turn right and walk up to Via Gaetano Previati (on the left, before the traffic lights); turn left and walk 100 meters to destination.


General Travel Information Lecco can be easily reached by plane, train or private car. Three main airports serve Milano city (and Lecco): Milano Linate, Milano Malpensa, and Milano Orio al Serio. All three airports are connected to major city railway stations through regular coach or train services.


Scientific committee


Organizing committee
Conference Contacts