English

Existence of the Map $det^{S^3}$

Rings and Algebras 2023-05-09 v2

Abstract

In this paper we show the existence of a nontrivial linear map detS3:Vd(3d3)kdet^{S^3}:V_d^{\otimes\binom{3d}{3}}\to k with the property that detS3(1i<j<k3d(vi,j,k))=0det^{S^3}(\otimes_{1\leq i<j<k\leq 3d}(v_{i,j,k}))=0 if there exists 1x<y<z<t3d1\leq x<y<z<t\leq 3d such that vx,y,z=vx,y,t=vx,z,t=vy,z,tv_{x,y,z}=v_{x,y,t}=v_{x,z,t}=v_{y,z,t}. This gives a partial answer to a conjecture from [10]. As an application, we use the map detS3det^{S^3} to study those d-partitions of the complete hypergraph K3d3K^3_{3d} that have zero Betti numbers. We also discuss algebraic and combinatorial properties of a map detSr:Vd(rdr)kdet^{S^r}:V_d^{\otimes\binom{rd}{r}}\to k which generalizes the determinant map, the map detS2det^{S^2} from [9], and detS3det^{S^3}.

Keywords

Cite

@article{arxiv.2211.10375,
  title  = {Existence of the Map $det^{S^3}$},
  author = {Steven R. Lippold and Mihai D. Staic},
  journal= {arXiv preprint arXiv:2211.10375},
  year   = {2023}
}

Comments

27 pages, comments welcome, update to previous paper on ArXiV with one section and one subsection added (applications to combinatorics)