“…In particular, Hibi [19] showed that the coefficients a i (P ) of a lattice polytope are symmetric, i.e., a i (P ) = a n−i (P ), if and only if P is reflexive. Kreuzer and Skarke [22,23] classified all reflexive polytopes in dimensions ≤ 4. For n = 2, 3, 4 there are respectively 16; 4, 319 and 473, 800, 776 reflexive polytopes (up to unimodular equivalence).…”