4 papers
Radicals in primitive axial algebras
Andrey Mamontov, Sergey Shpectorov, Victor Zhelyabin
The paper contributes to the structure theory of primitive axial algebras. For a primitive axial algebra with a Frobenius form we compare the largest ideal not containin…
Full automorphism groups of the axial algebra for and related algebras
Tendai M. Mudziiri Shumba, Sergey Shpectorov
In this paper, in continuation of arXiv:2311.18538, we compute the full automorphism groups of the 286-dimensional algebra for , its subalgebras and other related algebras.…
Strongly regular graphs with parameters (85,14,3,2) do not exist
Sergey Shpectorov, Tianxiao Zhao
We investigate the second smallest unresolved feasible set of parameters of strongly regular graphs, . Using the classification of cubic graphs of small degr…
Radicals in flip subalgebras
Bernardo G. Rodrigues, Sergey Shpectorov
We develop methods for determining key properties (simplicity and the dimension of radical) of flip subalgebras in Matsuo algebras. These are interesting classes of commutative non…