proposition: Lemma weight0_Zero a : weight a = 0%coqR -> a = @Zero A.
proof: Proof. by case: a => //= r c /esym Hr; move/ltR_eqF: (Rpos_gt0 r) => /eqP. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg fingroup perm matrix) mathcomp(mathcomp_extra boolp classical_sets Rstruct) mathcomp(ssrnum ereal) mathcomp(lra Rstruct reals) Reals ssrR Reals_ext Ranalysis_ext ssr_ext ssralg_ext logb realType_ext fdist