In this talk, we’ll discuss the facets (maximal simplices) of the Vietoris–Rips complex where denotes the -dimensional hypercube.
We are particularly interested in those facets which are somehow independent of the dimension .
Using Hadamard matrices, we prove that the number of different dimensions of such facets is a super-polynomial function of the scale , assuming that is sufficiently large.
We show also that the -th dimensional homology of the complex is non-trivial when is large enough, provided that the Hadamard matrix of order exists.