NonCommutative Rings


their Applications, VIII

NCRA, VIII, 28-31 August 2023

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. The faculty Jean Perrin
  12. Hotels and accomodations
  13. Meals
  14. Other meetings
  15. Contacts
  16. 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 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 31st of August 2023). The details about this meeting will be available very soon.. 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).
I am very happy to announce that Professor Michela Ceria, Politecnico di Bari (Italy) Department of Mechanics, Mathematics and Management. ( Information ) will give the course this year (6 hours).
c) The course by Michela Ceria will be given from 1.30 pm-3.15 pm (European time) with a 10-minute break.
The talk will be focused on rank metric codes. Amongst topics that will appear let us mention linearized polynomials, q-matroids, and finite geometry.
Besides the course, there will be 4 plenary talks (from 3.30 pm-4.30 pm) given by
  1. Steven Dougherty (Scranton University),
  2. Alberto Facchini (Padova University) ,
  3. Cesar Polcino Milies (Sao Paulo),
  4. Sergio Lopez-Permouth (Ohio University, Athens).
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 (Michela Ceria's course); 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. Michela Ceria, Bari Polytechnic (Italy).
  2. Steven Dougherty, Scranton University (Pennsylvania, USA)
  3. Alberto Facchini, University of Padova (Italy).
  4. S.K. Jain, Ohio University, Athens (USA).
  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. Yusuf Alagöz, Siirt University (Turkey).
  2. Lulwah Al-Essa, Imam Abdulrahman bin Faisal University, Dammam (Saudi Arabia).
  3. Dilshad Alghazzawi, King Abdulaziz University, Rabigh (Saudi Arabia).
  4. Shakir Ali, Department of Mathematics Aligarh Muslim University (India).
  5. Meltem Altun Özarslan, Hacettepe University (Turkey).
  6. Maria José Arroyo Paniagua Universidad Autonoma Metropolitana, México (Mexico).
  7. Samir Assuena, Centro Universitário da FEI (Brazil).
  8. Masood Aryapoor, Mälardalen University (Sweeden).
  9. Per Bäck, Mälardalen University (Sweden).
  10. Demba Barry, Sciences University, Bamako (Mali).
  11. Volodymyr Bavula, University of Sheffield (UK).
  12. Nabil Bennenni, USTHB, Alger (Algeria).
  13. Nathan Blacher, University of Sheffield (UK).
  14. Tomasz Brzezinski, Swansea University and University of Bialystok (G.B. and Poland).
  15. Engin Büyükasik, Izmir Institute of Technology (Turkey).
  16. Stefan Catoiu, DePaul University, Chicago (U.S.A.).
  17. Adam Chapman, Academic College of Tel-Aviv-Yaffo (Israel).
  18. Anna Cichocka, University of Technology (Poland).
  19. Gabriella D’Este, University of Milano (Italy).
  20. Max Dickmann, Sorbonne University, Paris (France).
  21. Steven Dougherty, Scranton University (USA).
  22. André Duarte, Sao Paulo University (Brazil).
  23. Nguyen Viet Dung Ohio University (USA).
  24. Yilmaz Durgun Çukurova University (Turkey).
  25. Michela Ceria, University Politecnico di Bari (Italy).
  26. Fatma Ebrahim, Al-Azhar University, Cairo (Egypt).
  27. Mahdieh Ebrahipour, Vali-e-Asr University of Rafsanjan (Iran).
  28. Susan El-Deken, Helwan University, Cairo (Egypt)
  29. Lhoussain El Fadil, Faculty of Sciences, Sidi Mohamed Ben Abdellah University (Morocco).
  30. Alberto Facchini, University of Padova (Italy).
  31. Raul Ferraz, Sao Paulo University (Brazil).
  32. Walter Ferrer, Dma. Universidad de la República. (Uruguay)
  33. José Gómez Torrecillas, Universidad de Granada (Spain).
  34. Huda Hamdan, Damietta University (Egypt).
  35. Leila Heidari Zadeh, Islamic Azad University, Shoushtar (Iran).
  36. Malgorzata Hryniewicka, Faculty of Mathematics, University of Bialystok (Poland).
  37. Surender Jain, University of OHIO, Athens (USA).
  38. Malgorzata Jastrzebska, Siedlce University (Poland).
  39. Yeliz Kara, Bursa Uludag University(Turkey).
  40. Mahmoud Khaled Ahmed, Elgazeera Higher Institute (Egypt).
  41. Ayten Koc, Gebze Technical University (Turkey).
  42. Emrah Korkmaz, Çukurova University (Turkey).
  43. Ahmed Laghribi, Université d'Artois (France).
  44. André Leroy, Université d'Artois (France).
  45. Sergio Lopez-Permouth, Ohio University, Athens (USA).
  46. Guanglin Ma, Nanjing University of Information Science and Technology (China).
  47. Praveen Manju, Indian Institute of Technology Delhi (India).
  48. Jerzy Matczuk, Warsaw University (Poland).
  49. Eli Matzri, Bar-Ilan University (Israel).
  50. Zeinab Mohamed, South Valley University (Egypt).
  51. Teo Mora, University of Genoa (Italy).
  52. Azam Mozaffarikhah, Ohio University (USA).
  53. Diksha Mukhija, University of Alberta (Canada).
  54. Mehrdad Nasernejad, Université d'Artois (France).
  55. Zahra Nazemian, Graz University (Austria).
  56. Cornelia Ott, Ulm University (Germany).
  57. Murad Ozaydin, University of Oklahoma (USA).
  58. André Perreira, Sao Paulo University (Brazil).
  59. Dmitri Piontkovski, HSE University, Moscow (Russia).
  60. Cesar Polcino Milies, Sao Paulo University (Brazil).
  61. Rakhi Pratihar, Inria Saclay Centre (France).
  62. Louis Rowen, Bar-Ilan University (Israel).
  63. Esengül Saltürk, Istanbul Atlas University (Turkey).
  64. Martha Lizbeth Sandoval, Universidad Autónoma Metropolitana (UAM-I) (Mexico)
  65. Serap Sahinkaya, Tarsus University (Turkey).
  66. Steven, University of Sheffield (UK).
  67. Virgilio Sison, University of the Philippines Los Banos (Philippines).
  68. Daniel Smertnig, Graz University (Austria).
  69. Patrick Solé, I2M (France).
  70. Ashish Srivastava, University of Saint Louis, Missouri (USA).
  71. Steve Szabo, Eastern Kentucky University (USA).
  72. Yaser Toloei, Razi University, Kermanshah (Iran).
  73. Felix Ulmer, University of Rennes (France).
  74. Gulsen Ulucak, Gebze Technical University (Turkey).
  75. Jay Wood, Western Michigan University (USA).
  76. Tulay Yildirim, Karabuk University (Turkey).
  77. Mohamed F. Yousif, The Ohio State University (USA).
  78. Yiqiang Zhou, Memorial University of Newfoundland (Canada).

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You can find the schedule of the talks here .


  1. Michela Ceria, the course...!!
    Course 1 ; Course 2 ; Course 3 ; Course 4 .
  2. Yusuf Alagöz, Siirt University, Rings Related to R-projectivity and Max-projectivity
    Abstract .
  3. Meltem Altun Özarslan, Hacettepe University, Regular Lifting Morphisms Abstract .
  4. Masood Aryapoor, Mälardalen University, Evaluation of skew rational functions Abstract .
  5. Per Bäck, Mälardalen University, Non associative skew Laurent polynomials .
    Abstract ; Talk .
  6. Volodymyr Bavula, University of Sheffield, Classifications of prime ideals and simple modules of the Weyl algebra $A_1$ in prime characteristic Abstract .
  7. Nabil Bennenni, USTHB, Alger (Algeria). Skew cyclic codes and cryptography Abstract .
  8. Anna Cichocka, Warsaw University of Technology, On some classes of subalgebras of Leavitt path algebras Abstract .
  9. Gabriella D’Este, University of Milano, Bijections between indecomposable summands of basic tilting-type modules
    Abstract ; Talk .
  10. Steven Dougherty, Scranton University, Codes and the MacWilliams RelationsThis talk is a plenary talk in the QFRC meeting QFRC .
  11. André Duarte, Sao Paulo University, Projective Essential idempotents Abstract ..
  12. Yilmaz Durgun Çukurova University, Rings with one subprojective middle class Abstract .
  13. Fatma Ebrahim Al-Azhar University Symmetry Questions about Amenability and simplicity of Bases Abstract ..
  14. Mahdieh Ebrahimpour, Vali-e-Asr University of Rafsanjan, On the dual notion of graded n-absorbing primary submodules
    Abstract ; Talk .
  15. Lhoussain El Fadil, Sidi Mohamed Ben Abdellah University, High order Newton polygons applied to Extensions of Valuations.
  16. Alberto Facchini, Padova University, Heaps, trusses
    . Abstract ; Talk .
  17. Leila Heidari Zadeh, Islamic Azad University, Shoushtar, Lie superderivations of generalized matrix algebras
    Abstract ; Talk .
  18. Malgorzata Hryniewicka, Faculty of Mathematics, University of Bialystok Hopf algebras versus Hopf heaps
    Abstract ; Talk .
  19. Ayten Koc, Gebze Technical University, Representation of Leavitt path Algebras
    Abstract ; Talk .
  20. Sergio Lopez-Permouth, University of Ohio, Athens, Collaborations between binary operations Abstract .
  21. Guanglin Ma, Univerité d'Artois, Periodic, semi-clean, and CJ elements
    Abstract ; Talk .
  22. Praveen Manju, Indian Institute of Technology Delhi Inner and Outer Derivations of $FV_{8n}$
    Abstract .
  23. Teo Mora, DIMA- Universit`a di Genova, A termording free variation of Moller algorithm
    Abstract ; Talk .
  24. Diksha Mukhija, University of Alberta Excellent field extensions for quadratic and bilinear forms
    Abstract ; Talk .
  25. Mehrdad Nasernejad, Université d'Artois, Symmetric closure in modules and rings
    Abstract ; Talk .
  26. Cornelia Ott, Ulm University, Dual containing cyclic left module $(\sigma,\delta)$-codes $Rg/Rf\subset R/Rf$ over finite commutative Frobenius rings
    Abstract .
  27. Dmitri Piontkovski, HSE University, Moscow Growth rate of monomial algebras as a derived invariant of noncommutative varieties Abstract .
  28. Cesar Polcino Milies, Sao Paulo University, Essential idempotents in coding theory and in twisted group algebras
    Abstract ; Talk .
  29. Rakhi Pratihar, Inria Saclay Centre, Construction of optimal codes using linearized polynomials
    Abstract ; Talk .
  30. Louis Rowen, Bar-Ilan University, Structure of admissible pairs
    Abstract ; Talk .
  31. Serap Sahinkaya, Tarsus University Additive skew G-codes over finite fields Abstract .
  32. Esengül Saltürk, Istanbul Atlas University, Counting codes over Rings with a given hull Abstract ; Talk .
  33. Ashish Srivastava, University of Saint Louis, Graded automorphisms and Zhang twist of Leavitt path algebras Abstract .
  34. Jay Wood, Western Michigan university Homogeneous Weight Enumerators (Slight Return)
    Abstract ; Talk .
  35. Mohamed F. Yousif, The Ohio State University Direct complements almost unique
    Abstract ; Talk .

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


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


There will be proceedings for the NCRA, VIII 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 2023. 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:
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:
you can contact us by email:
For A. Leroy: André Leroy
For A. Laghribi: Ahmed Laghribi


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


    Address of organizer of NCRA, VIII, 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 31 August 2023, just after the NCRA VIII; you can find more information: here


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

    de Mathématiques de Lens