Canadian Number Theory Association Conference

The Canadian Number Theory Association (CNTA) was founded in 1987 at the International Number Theory Conference at Laval University (Quebec city), for the purpose of enhancing and promoting learning and research in number theory, particularly in Canada. To advance these goals, the CNTA organizes bi-annual conferences that showcase new research in number theory, with the aim of exposing Canadian and international students and researchers to the latest developments in the field. The CNTA meetings are among the largest number theory conferences world-wide. A list of previous CNTA meetings can be found here.

The fifteenth CNTA will go back to its birthplace and take place at Laval University on July 9-13, 2018.

Registration and funding

Participants are kindly invited to register here.

The registration fees are set as follows.
Before May 16th On or after May 16th
Students/postdocs 75CAD 95CAD
Researchers without individual grants 100CAD 140CAD
Researchers with individual grants 225CAD 285CAD
Registration fees cover drinks and snacks during breaks and a reception at Centre des congrès de Québec, which will take place on July 10.

Ribenboim Prize

The Ribenboim Prize, named in honour of Paulo Ribenboim, is awarded for distinguished research in Number Theory by a mathematician who is Canadian or has close connections to Canadian Mathematics. Previous winners are: Andrew Granville (1999), Henri Darmon (2002), Michael Bennett (2004), Vinayak Vatsal (2006), Adrian Iovita (2008), Valentin Blomer (2010), Dragos Ghioca (2012), Florian Herzig (2014), Jacob Tsimerman (2016).

The prize winner will receive a certificate and medal and will give a plenary talk at the meeting. Normally the prize winner should have received his or her Ph.D. within the last 12 years. Nominators should submit to the selection committee, by February 28th 2018 the following:

  1. A letter of nomination (an individual cannot nominate himself or herself), a citation of not more than 250 words, stating why the nominee should receive the award.
  2. A curriculum vitae of the nominee of at most 20 pages, including a list of publications.
  3. At least 3 supporting reference letters for the nominee.
Note that the selection committee can solicit additional reference letters if it deems it necessary. Electronic submission in pdf format to Hugo Chapdelaine is preferred.


All talks will take place in Pavillon Alexandre-Vachon at Laval University. See map.

We are pleased to dedicate this conference to professor PAULO RIBENBOIM to mark his 90th anniversary:

''Les nombres, des amis qui nous donnent des problèmes''

With the participation of the distiguished plenary speaker Robert P. Langlands

Plenary Speakers

Henri Darmon (McGill)
Andrew Granville (Montréal)
Melanie Matchett Wood (Wisconsin-Madison)
Ken Ono (Emory)
Bjorn Poonen (MIT)
Damien Roy (Ottawa)
Dinesh Thakur(Rochester)
Jared Weinstein (Boston University)

Invited Speakers

Alex Bartel (Glasgow)
Laurent Berger (Lyon)
Pierre Charollois (Jussieu)
Huayi Chen (Paris 7) 
Vladimir Dokchitser (KCL)
Sary Drappeau (Aix-Marseille)
Tom Fisher (Cambridge)
Holly Krieger (Cambridge)
Daniel Kriz (Princeton)
Dimitris Koukoulopoulos (Montréal)
Youness Lamzouri (York)
Jaclyn Lang (Max Planck)
Robert Lemke Oliver (Tufts)
Florian Luca (Witwatersrand)
Steven Miller (Williams College)
Yiannis Petridis (UCL)
Siddarth Sankaran (Manitoba)
Will Sawin (Princeton)
Damaris Schindler (Utrecht)
Arul Shankar (Toronto)
Vinayak Vatsal (UBC)
Stefano Vigni (Genova)
Michel Waldschmidt (Jussieu)
David Zywina (Cornell)

There will also be a number of contributed talks during the conference.


To come.


  • The closest hotel is
    Hotel Universel
    (12 minutes by foot from the math. dep.). We have reserved a block of 30 rooms with a preferential rate:
      $ 120 + taxes in single occupancy or double occupancy (and 20$ per additional person)
    Note that this rate is valid until
    June 8th
    and it does not include breakfast. In order to benefit from this rate you need to make your reservation
    by phone
    : 1-800-463-4495. The name of the event is CNTA-2018 and our group no is 396543. If you want to visit the Hôtel Universel website please click here.
  • For people who are looking for a cheaper aleternative to the Hotels, we have a few rooms available in apartments. These apartments are located in
    Résidences étudiantes le Sommet
    click here to see their location. Each apartment has 3 separate bedrooms (each equipped with a double bed), a nice kitchen, a bathroom (sink + shower) separated from a small WC (sink+toilet) and a balcony (Download the pdf ). These apartments are located 15 minutes by foot from the conference site and are 3 minutes away from a grocery store. These rooms are very limited in number and we shall give priority to the students. The cost for one room is 65$ per night (taxes included). If you are interested to have one of them please send an email to Hugo Chapdelaine .
  • Participants who would like to share a room may use this forum to find roommates.
  • Travel information

  • Attendees who are not Canadian residents should check on Canada's current entry requirements in advance of their travel here. In particular, there is a new entry requirement since 2016:

    "An electronic travel authorization (eTA) is required for all visa-exempt foreign nationals, except United States (U.S.) citizens and certain other small groups."

  • Tourism in Quebec city
  • Organizers

    Local Organizing Committee

    Hugo Chapdelaine
    Jean-Marie De Koninck
    Antonio Lei
    Claude Levesque

    Scientific Committee

    Kathrin Bringmann (University of Cologne)
    Nils Bruin (Simon Fraser University)
    Gérard Freixas (CNRS - Institut de Mathématiques de Jussieu)
    Stephen Kudla (University of Toronto)
    Matilde Lalin (Université de Montréal)
    Antonio Lei (Université Laval)
    Christelle Vincent (University of Vermont)