HTML> Colloque

NonCommutative Rings

and

their Applications, IX



NCRA, IX, 30 June-04 July 2025


Hybrid Conference

  1. General overview, special features
  2. Scientific committee
  3. Participants
  4. Program
  5. Talks
  6. Abstracts
  7. Proceedings
  8. How to register
  9. Pictures
  10. Arriving in Lens
  11. Hotels and accomodations
  12. Meals
  13. Other meetings
  14. Contacts
  15. Sponsors

General overview, special features

a) The conference will be hybrid. Most of the talks will be given in an auditorium in Lens and retransmitted online
As in 2023 and 2021, the conference is divided into two parts. The first part is the NCRA, the second part consists of a one-day meeting " quadratic forms, rings, and codes" (on the 4th of July 2025). The details and webpage of this meeting: The QFRC meeting
. The idea is to encourage transversal cooperation between different branches of Algebra. We encourage you to attend this meeting as well.
b) As for the previous editions of this conference, the aim is to gather specialists in ring theory and in areas where this theory is used (for example in representation theory, coding theory, cryptography).
This year the 8-hour course will be given by Joachim Rosenthal (Department of Mathematics, University of Zurich) and Gianira Alfarano (Univerité de Rennes)
c) This course will be given from 1.30 pm-3.15 pm (European time) with a 10-minute break. More details about the content of this course will be given later.
Besides the course, there will be 4 plenary talks (from 3.30 pm-4.30 pm) given by
  1. Dinesh Khurana (Panjab University, Chandigarh),
  2. Steve Szabo (Easter Kentucky University),
  3. Tomasz Brzezinski, (Swansea university and Bialystock University),
  4. Dolors Herbera , (Universitat Autònoma de Barcelona).
Two sessions will be organized for participants who want to present their recent results during short 20 minutes talks. One session will be from 9.00 a.m. to 12.00 a.m. (European time) and the other one will take place from 4.45 p.m. to 6.45 p.m.
To sum up: 9.00 am-12.00 am (talks session 1); 1.30 pm-3.25 pm (The course given by Joachim Rosenthal and Gianira Alfarano); 3.30 pm-4.30 pm (plenary talks); 4.45 p.m. to 6.45 p.m. (talks second session) We will encourage exchanges between the participants by opening thematic rooms. The course and all the talks will be recorded and available online When you will register to give a talk you will be asked in which session you want to talk. Even if you don't intend to give a talk, we would appreciate you registering,...So that we can send you updates.


Scientific committee

  1. Gianira Alfarano, Univerité de Rennes (France).
  2. Steven Dougherty, Scranton University (Pennsylvania, USA)
  3. Alberto Facchini, University of Padova (Italy).
  4. Joachim Rosenthal, University of Zurich (Switzerland) .
  5. Ahmed Laghribi, Université d'Artois (France).
  6. Sergio Lopez-Permouth, Ohio University, Athens (USA).
  7. Cesar Polcino Milies, Sao Paulo Unversity (Brazil).
The committee will select the talks and the papers submitted to the proceedings.
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List of participants

  1. Gianira Alfarano, Univerité de Rennes (France).
  2. Tomasz Brzezinski, Swansea university and Bialystock University(UK,Poland).
  3. Lucio Centrone, Università degli Studi di Bari (Italy).
  4. Michela Ceria, University Politecnico di Bari (Italy).
  5. Avanish Kumar Chaturvedi, Department of Mathematics, University of Allahabad (India).
  6. Steven Dougherty, Scranton University (USA).
  7. Yuriy Drozd, Harvard University (USA) & Institute of Mathematics, National Academy of Sciences (Ukraine)
  8. André Duarte, Sao Paulo University (Brazil).
  9. Fatma Ebrahim, Al-Azhar University, Cairo (Egypt).
  10. Susan El-Deken, Helwan University, Cairo (Egypt).
  11. Lhoussain El Fadil, Faculty of Sciences, Sidi Mohamed Ben Abdellah University (Morocco).
  12. Alberto Facchini, University of Padova (Italy).
  13. Raul Ferraz, Sao Paulo University (Brazil).
  14. Walter Ferrer, Dma. Universidad de la República. (Uruguay)
  15. Yuval Ginosar, : University of Haifa (Israel).
  16. Huda Hamdan, Damietta University (Egypt).
  17. Malgorzata Hryniewicka, Faculty of Mathematics, University of Bialystok (Poland).
  18. Surender Jain, University of OHIO, Athens (USA).
  19. Malgorzata Jastrzebska, Siedlce University (Poland).
  20. Dinesh Khurana, Panjab University, Chandigarh (India).
  21. Anjana Khurana, Panjab University, Chandigarh (India).
  22. Omar Kchit, Graduate Normal School of Fez, Sidi Mohamed Ben Abdellah University (Morroco).
  23. Dominik Krasula, Charles University, Department of Algebra (Czech Republic)
  24. Ahmed Laghribi, Université d'Artois (France).
  25. Yuanlin Li, Brock University (Canada).
  26. André Leroy, Université d'Artois (France).
  27. Sergio Lopez-Permouth, Ohio University, Athens (USA).
  28. Nico Lorenz, Ruhr-Universität Bochum (Germany).
  29. Guanglin Ma, Nanjing University of Science and Technology (China).
  30. Jerzy Matczuk, Warsaw University (Poland).
  31. Trisha Maiti, Université d'Artois, Lens (France).
  32. Mehrdad Nasernejad, Université d'Artois, Lens (France).
  33. Hassan Ou-azzou, Institute of Computer Science, University of St.Gallen, St. Gallen (Switzerland).
  34. André Perreira, Sao Paulo University (Brazil).
  35. Cesar Polcino Milies, Sao Paulo University (Brazil).
  36. Joachim Rosenthal, University of Zurich (switzerland).
  37. Louis Rowen, Bar-Ilan University (Israel).
  38. Esengül Saltürk, Istanbul Atlas University (Turkey).
  39. Virgilio P. Sison, University of the Philippines Los Banos (Philippines)
  40. Patrick Solé, I2M (France).
  41. Steve Szabo, Eastern Kentucky University (USA).
  42. Yaser Toloei, Razi University, Kermanshah (Iran).
  43. Daniel Vitas, University of Ljubljana (Slovenia).
  44. Tulay Yildirim, Karabuk University (Turkey).
  45. Mohamed F. Yousif, The Ohio State University (USA).

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Program

This will be posted later .

Talks

  1. Avanish Kumar Chaturvedi, On some classes of noncommutative rings related to reversibility.
  2. Yuriy Drozd, Bäckström and nodal orders.
  3. Omar Kchit, Constructing infinite families of number fields from quadrinomials with given indices.
  4. Anjana Khurana, Quadratic forms, a new invariant of a field and some applications.
  5. Dominik Krasula, Matrix representations of finite Frobenius rings.
  6. Trisha Maiti, Kato-Milne cohomology group over rational function field in characteristic 2.
  7. Yuanlin Li, Nil clean group rings over metacyclic groups.
  8. Nico Lorenz, Representation Graphs of Quadratic Forms.
  9. Hassan Ou-azzou, On equivalence of skew polycyclic codes over finite fields.
  10. Esengül Saltürk, Binary self-orthogonal codes and their neighbor graphs.
  11. Daniel Vitas, Ideal Factorization Theory in HNP Rings.
  12. Yuval Ginosar, From extension of groups to realization-obstruction of graded algebras and back.

With the author's agreement, the slides and the video of the talks will be posted here.

Abstracts

Thanks for using the Template . Please send both a PDF and a .tex file.

Proceedings

There will be proceedings for the NCRA, IX conference. The papers submitted will be refereed classically.
The scientific committee will serve as an editorial board. Consider seriously submitting a paper!
Deadline for submitting an article: 31 December 2025. Please do consider to submit an article.

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How to register

Just send me an email with the following information:
First name:
Last name:
Affiliation:
Schedule for the talk: Choose either from 9.00 a.m. to 12.00 a.m. (European time) or from 4.45 p.m. to 6.45. p.m.
Title of the talk:
Please also mention if you intend to attend in person or online.
you can contact us by email:
For A. Leroy: André Leroy
For A. Laghribi: Ahmed Laghribi

Pictures

Some pictures from the meeting will be posted here.

Social and cultural event

The classical visit of "le Louvre-Lens" will be organized for those attending in Lens. For the persons who will take part online, we will try to take photos and videos of the visit and post them online. You can also have access to the virtual short visit at the following URL. Le Louvre Lens


Arriving in Lens

BY PLANE There are 4 different airports not too far from Lens;

  • Lesquin (International Air Transport Association: LIL). This is the airport of Lille (the biggest city in the north of France) It is the closest (35 km from Lens). If you arrive at this airport you will have to take a bus to the Lille railway station (Lille Flandres) and then take a train to Lens. Notice that as far as I know there are no connections by plane between Charles de Gaulle airport and Lesquin so even if your ticket plane says that you have a stop in CDG and then go to Lesquin it is highly probable that this last part of your journey (from CDG to Lesquin) will be by train!
    Lesquin (Lille) airport

  • Charles de Gaulle at Roissy (IATA code: PAR; ICAO code: CDG). This is the most likely airport of arrival if you are coming from abroad. There is a train station and you can connect directly to Lens or go to Lille and in Lille take a train to Lens (this is sometimes faster since there are not too many direct trains from CDG to Lens).
    CDG airport
    Connection between CDG airport and Lens Train from CDG airport

  • Beauvais (IATA code BVA) This airport is very close to the city of Beauvais (Tillé). You could arrive at this airport especially if you use low-fare airlines. There is a frequent bus shuttle to the center of Beauvais and from there you can take a train to Lens via Paris Nord 'and possibly with a stop in Arras)
    Beauvais airport
    train connections from Beauvais

  • Charleroi (IATA code CRL) This airport is in Belgium (also called Brussels south airport). This airport is not too far from Lens but you will have to take a shuttle to Brussels or to Charleroi and then take a train to Lens (probably via Lille). There are quite a few low-cost companies using this airport.
    Charleroi Airport

    Hotels and accomodations


    A) Hotels I can reserve a room for you but of course, you can do this directly as well (if you want me to do so, please mention it while registering, since I'll try to get some discount for the participants).
    1) The closest hotel is the "Hotel Bollaert". Here is a link for the hotel Bollaert
    2) The hotel "Campanile Lens" is not too far (about 30 minutes walk). If you have a car... Here is a link for the hotel Campanile
    3) The hotel "Le Paris Brest-Brest" is located nearly in front of the train station. This means at about 15 minuts walk from the faculty. For more information on this hotel click here
    4) Just in front of the station: Hotel de France, 2 Place du Général de Gaulle Hotel de France.
    5) Hotel "Ibis Style" is located Place du général de Gaulle, in front of the station Hotel Ibis .

    Meals

    The breakfasts and the lunches will be offered to all the participants during the congress.

    Contacts

    Address of organizer of NCRA, IX, and QFRC:
    André Leroy
    Home page ou ICI
    Other meetings

    Other meeting

    The meeting "Quadratic Forms, Rings, and Codes" will take place in Lens on the 4th July 2025, just after the NCRA IX;

    Sponsors

    1. L.M.L. (laboratoire de mathématiques de Lens).
    2. BQR.
    3. Conseil régional des Hauts de France.




    Laboratoire
    de Mathématiques de Lens