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), 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. There will be several sessions of contributed talks during the conference. Participants who would like to speak at one of these sessions are invited to indicate their interests on their registration form before May 1st.

The registration fees are set as follows.
Before May 1 On or after May 1
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. Depending on our funding situation, we will provide a number of travel grants to students and researchers with limited fundings. Please indicate on your registration form if you would like to apply for one of these grants.

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.

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)
Maryna Viazovska (EPFL)*
Jared Weinstein (Boston University)
* = to be confirmed

Invited Speakers

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


To come.


We have reserved a block of rooms with the residence service of Université Laval. The university residences are located 7 minutes away by foot from the mathematics department. The are two types of rooms available:

  • Standard University Room with a shared bathroom.
    These rooms have two single beds and feature all the amenities usually available in hotels or bed linen and towels, shampoo and soap, parking included, free wireless internet access and free local calls.
      $47,75 + taxes in single occupancy and $67,50 + taxes in double occupancy (breakfast is included)

  • Superior University Room (private bathroom):
    These rooms are equipped with a bathroom, a Queens bed, a TV, a microwave oven, refrigerator and telephone. They usually have all the amenities offered by hotels or bed linen and towels, shampoo and soap, parking included, free wireless internet access and free local calls.
      $ 106 + taxes in single occupancy or double occupancy (*Breakfast is included)

  • *Participants who would like to share a room may use this forum to find roommates.
    **Note that the breakfast will be seved in Pavillon Alphonse-Desjardins from 7h00-9h00am. Once you check-in at the reception, you shall receive a number of coupons (for the breakfasts) according to how many nights you stay.

  • You may find more information about our university residence service by clicking: here
  • To make a
    reservation now
    at the university residences you may first click on the following link, then click on the   "Go to reservation form button",   and then choose the   "#276571: CNTA XV"   in the drop-down menu.

  • For people who would prefer to stay in a regular hotel, the closest one 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 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. This special rate will remain valid until the 9th of June. If you want to visit the Hôtel Universel website please click here.
  • 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)


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