g2a2–2025
Groups and Graphs, Algebras and Applications
International Conference and PhD-Master Summer School
August 3–17, 2025
Novosibirsk, Russia
August 3–17, 2025
Novosibirsk, Russia
About G2A2
"Groups and Graphs, Algebras and Applications", G2A2–2025, belongs to the G2-series including international conferences and summer schools. Since 2014, the G2-events were held in Russia and China, and in Slovenia as satellite events of the 8th European Congress of Mathematics. For more details, see Useful links.
G2A2–2025 aims to bring together experts, young researchers and students from different fields of mathematics and their applications mainly based on algebra and group theory, geometry and algebraic graph theory, topology and algebraic combinatorics, coding theory and theory of computational complexity, especially those involving group actions on combinatorial objects.
The official language of the event is English.
G2A2–2025 aims to bring together experts, young researchers and students from different fields of mathematics and their applications mainly based on algebra and group theory, geometry and algebraic graph theory, topology and algebraic combinatorics, coding theory and theory of computational complexity, especially those involving group actions on combinatorial objects.
The official language of the event is English.
Venue
All scientific activities take place at Novosibirsk State University, August 3−17, 2025.
August 3 is the day to arrive and August 17 is the day to leave, that is, there are no activities on these days.
The Novosibirsk State University (NSU) is a part of the scientific centre Akademgorodok, which is located in about 30 km south of the city center of Novosibirsk and about 40 km east of the International airport Tolmachevo.
All Conference activities and Summer School minicourses take place in Conference hall 3107. Classes of minicourses take place in Seminar room 3113. Two other rooms 3151 and 3153 are available for free discussions. Map of the building is available on NSU website, "My NSU" iOS app as well as in 2GIS app — general maps and navigation app with an offline mode.
August 3 is the day to arrive and August 17 is the day to leave, that is, there are no activities on these days.
The Novosibirsk State University (NSU) is a part of the scientific centre Akademgorodok, which is located in about 30 km south of the city center of Novosibirsk and about 40 km east of the International airport Tolmachevo.
All Conference activities and Summer School minicourses take place in Conference hall 3107. Classes of minicourses take place in Seminar room 3113. Two other rooms 3151 and 3153 are available for free discussions. Map of the building is available on NSU website, "My NSU" iOS app as well as in 2GIS app — general maps and navigation app with an offline mode.
Program
The program of the G2A2−2025 consists of 50-minute invited talks and 25-minute contributed talks in the frame of the International Conference and 4 minicourses in the frame of the PhD-Master Summer School.
G2A2-PhD-Master Summer School
The scientific program of the G2A2-Summer School is presented by 4 courses each consisting of 8 lectures.
Minicourse 1
Closures of finite permutation groups
Minicourse 3
Low dimensional classical groups and their geometries
Minicourse 4
(Cancelled due to an emergency case)
(Cancelled due to an emergency case)
Combinatorial search with lies, error-correcting codes, and other applications of finite fields
G2A2-International Conference
The scientific program of the G2A2-Conference is presented by 50-minute invited talks and 25-minute contributed talks. Keynote and plenary speakers are:
- Nikolay Abrosimov (Sobolev Institute of Mathematics, Russia), Geometry of knots: from representation of the fundamental group to the volume formula (pdf)
- Valeriy Bardakov (Sobolev Institute of Mathematics, Russia), Rota-Baxter operators on groups, racks, algebras, and Yang-Baxeter equation (pdf), Rota-Baxter operators on groups: some open problems (pdf)
- Sasmita Barik (Indian Institute of Technology Bhubaneswar, India), Reciprocal eigenvalue properties of graphs (pdf)
- Matthew Bernard, Partition function of bipartite graph embedding (pdf)
- Viktor Byzov (Vyatka State University, Russia), Strongly regular digraphs with parameters (22,9,6,3,4) and the explicit construction of infinite families of strongly regular digraphs (pdf)
- Huye Chen (Guangxi University, China), On the Burness-Giudici conjecture for the Lie type simple groups of rank one (pdf)
- Dmitri Drozdov, Building self-similar forests (pdf)
- Shaofei Du (Capital Normal University, China), Decomposition of Groups and Cayley Maps (pdf)
- Tao Feng (Beijing Jiaotong University, China), Cyclic Steiner quadruple systems: constructions and classifications (pdf)
- Clara Franchi* (Università Cattolica del Sacro Cuore, Italy)
- Alexander Gavrilyuk (University of Memphis, USA), Intersecting families of spanning trees in complete bipartite graph (pdf)
- Aleksey Glebov (Sobolev Institute of Mathematics, Russia), Some aspects of the coalition domination problem (pdf)
- Hamid Golmohammadi (Novosibirsk State University, Russia), Coalitions in graphs: A survey and recent results (pdf)
- Ilya Gorshkov (Sobolev Institute of Mathematics, Russia), Axial algebras, graphs and their automorphism groups (pdf)
- Daniil Goshkoder (Skolkovo Institute of Science and Technology, Russia), Code constructions for non-adaptive group testing (pdf)
- Yaroslav Gostyukhin (Novosibirsk State University, Russia), Classification of Rota-Baxter operator on algebra H4(+) (pdf)
- Lilia Grunwald (Sobolev Institute of Mathematics, Russia), On the critical group of the cone over a sandwich graph (pdf)
- Vsevolod Gubarev (Novosibirsk State University, Russia), Rota-Baxter operators on a sum of fields and rooted 2-colored trees (pdf)
- Maria Grechkoseeva (Sobolev Institute of Mathematics), Element orders in graph extensions of finite simple exceptional groups (pdf)
- Jin Guo* (Hainan University, China)
- Alexander A. Ivanov (Hebei Normal University, China)
- Alex Iskra (Sobolev Institute of Mathematics, Russia), Orders of products of class transpositions (pdf)
- Vladislav Kabanov (N. N. Krasovskii Institute of Mathematics and Mechanics, Russia)
- Mahliyo Kadirova (Novosibirsk State University, Russia), On self-similar dendrites with infinite ramification in finite dimensional space (pdf)
- Polina Kaidash (Novosibirsk State University, Russia), Super domination polynomial of a graph (pdf)
- Pavel Kolesnikov (Sobolev Institute of Mathematics, Russia), On the Dong property for binary quadratic operad (pdf)
- Artem Kravchuk (Sobolev Institute of Mathematics, Russia), Constructing segments of quadratic length in Spec(Tn) through segments of linear length (pdf)
- Denis Krotov (Sobolev Institute of Mathematics, Russia), Completely regular codes in graphs covered by a Hamming graph (pdf)
- Xiaoqing Lu, Discrete analytic functions on the Gaussian lattice (pdf)
- Mario Mainardis* (Università degli Studi di Udine, Italy)
- Natalia Maslova (N. N. Krasovskii Institute of Mathematics and Mechanics, Russia), Gruenberg-Kegel graph, graphs defined on groups, and graphs with regularity conditions (pdf)
- Alexander Mednykh (Sobolev Institute of Mathematics, Russia), Homology group of branched coverings of knots and Jacobians of graphs (pdf)
- Ilya Mednykh (Sobolev Institute of Mathematics, Russia), Characteristic polynomial of Laplacian matrix for circulant foliations (pdf)
- Yan Min (Hong Kong University of Science and Technology, China), Vertex type and angle congruent tiling (pdf)
- Ivan Mogilnykh (Sobolev Institute of Mathematics, Russia), Minimum distances of LDPC codes in 5G standard (pdf)
- Luka Nikiforov, Prefix reversal triples that generate the symmetric group (pdf)
- Alexandr Panasenko (Novosibirsk State University, Russia), Decompositions of octonions into a sum of two subalgebras (pdf)
- Yanni Pei (China Three Gorges University, China), Positivity problem of three-term recurrence sequences (pdf)
- Vladimir Potapov (n/a, Russia), Relations between error-correcting codes and cryptographic functions (pdf)
- Saúl A. Blanco Rodríguez (Indiana University, USA), Some properties of prefix-reversal graphs (pdf)
- Grigory Ryabov (Novosibirsk State Technical University, Russia & Hebei Normal University, China), Cayley graphs with regularity conditions from difference sets (pdf)
- Georgy Shabat (Moscow Pedagogical State University, Russia), Dessins d'enfants related to some remarkable groups and algebras (pdf)
- Saveliy Skresanov (Sobolev Institute of Mathematics, Russia), Growth of subsets in finite simple groups (pdf)
- Pavel Sokolov (Novosibirsk State University, Russia), Some examples of crossed G-algebras (pdf)
- Galina Sokolova (Novosibirsk State University, Russia), Characteristic polynomial of the Laplacian of a circulant graph with non-fixed jumps (pdf)
- Alexey Staroletov (Sobolev Institute of Mathematics, Russia), On eigenvalues of permutations in irreducible representations of symmetric and alternating groups (pdf)
- Haofang Sun (The Hong Kong University of Science and Technology, China), Tiling of the sphere by congruent curvilinear quadrilaterals (pdf)
- Timur Nasybullov (Mathematical Center in Akademgorodok & Novosibirsk State University & Sobolev Institute of Mathematics, Novosibirsk, Russia), On connections between the additive and multiplicative groups of a skew brace (pdf)
- Anna Taranenko (Sobolev Institute of Mathematics, Russia), On cuboctahedrons in latin squares and hypercubes (pdf)
- Andrei Tetenov (Sobolev Institute of Mathematics, Russia), Self-similar dendrites with finite boundary and their associated graphs (pdf)
- Natallia Tokareva (Sobolev Institute of Mathematics & Novosibirsk State University, Russia)
- Vladimir Trofimov (N. N. Krasovskii Institute of Mathematics and Mechanics, Russia)
- Anastaliya Vasilyeva (Sobolev Institute of Mathematics, Russia), On completely regular codes with low adjacency in Manhattan metric (pdf)
- Ivan Yudin (Sobolev Institute of Mathematics, Russia), On the orders of points of a self-similar dendrite with finite boundary (pdf)
- Shikang Yu (Beijing Jiaotong University, China), Orthomorphisms and complete mappings of groups (pdf)
- Wei Zhou (Sobolev Institute of Mathematics, Russia), On groups with the same set of conjugacy class sizes as nilpotent groups (pdf)
- Yan Zhu (University of Shanghai for Science and Technology, China), Multivariate P- and/or Q-polynomial association schemes (pdf)
- Kseniya Zimireva (Novosibirsk State University, Russia), Linear representation of cactus groups by automorphisms of free module (pdf)
Accommodation
The organisers recommend that you book accommodation in the hotel "Golden Valley" via the hotel webpage. The webpage is available in English, Russian and Chinese.
While booking you don't need to pay upfront. The payment can be accepted after arrival. The payment is only accepted in Rubles — by credit/debit cards issued in Russia or in cash.
The hotel is located a 5-minute-walk away from the conference venue.
While booking you don't need to pay upfront. The payment can be accepted after arrival. The payment is only accepted in Rubles — by credit/debit cards issued in Russia or in cash.
The hotel is located a 5-minute-walk away from the conference venue.
Social Events
The organizers provide a range of activities for networking and entertainment:
- August 3 (Sunday), 19:00–21:00 — Welcome party, in front of the Conference Hall 3107.
- August 6 (Wednesday), 20:00–21:00 — Tour to the NSU Dome: a group of 20 people max, price 400 ₽.
- August 9 (Saturday), 19:00–22:00 — Conference Dinner at Art Pub Club. Price 3000 ₽.
- August 10 (Sunday), 10:00–12:00 — Tour to the NSU Earth Evolution Museum guided in English: a group of 50 people max, price 300 ₽, souvenirs are available.
- August 13 (Wednesday), 18:00–19:00 and 20:00–21:00 — extra slots for Tour to the University Dome: a group of 20 people max per slot, price 400 ₽.
Useful links
G2R2-2018 Video
Acknowledgements
Our special thanks goes to Natalia Pauli, Head of Marketing and Communication Policy Department of Novosibirsk State University, and Inessa Bakhareva, photographer, for providing the best quality pictures of the famous stained glass windows custom-designed by Vladimir Sokol for the main building of NSU in 1975. One can read about history of these stained glass windows here (in Russian).
Organizers
The G2A2-2025 is organized by the Mathematical Center in Akademgorodok, Novosibirsk State University and Sobolev Institute of Mathematics in cooperation with the Sino-Russian Mathematics Center at Peking University (Beijing), Three Gorges Mathematical Research Center at China Three Gorges University (Yichang) and Hebei International Joint Research Center for Mathematics and Interdisciplinary Science, Hebei Normal University (Shijiazhuang).
Main organizers:
Main organizers:
- Nikolay Abrosimov, Sobolev Institute of Mathematics, Russia
- Elena Konstantinova, Mathematical Center in Akademgorodok, Sobolev Institute of Mathematics, Novosibirsk State University, Russia & Three Gorges Mathematical Research Center, China Three Gorges University, China
- Darya Lytkina, Mathematical Center in Akademgorodok, Sobolev Institute of Mathematics, Novosibirsk State University, Russia
- Andrey Mamontov, Sobolev Institute of Mathematics, Novosibirsk State University, Novosibirsk, Russia
- Yaokun Wu, Shanghai Jiao Tong University, China
- Liping Yuan, Hebei Normal University, China
- Alexey Zakharov, Mathematical Center in Akademgorodok, Sobolev Institute of Mathematics, Novosibirsk State University, Russia
- Evgeny Yatsko, Mathematical Center in Akademgorodok, Novosibirsk State University, Russia
Photo
The conference and summer school are supported by the Mathematical Center in Akademgorodok under agreement No. 075−15−2022−281 with the Ministry of Science and Higher Education of the Russian Federation