∀ {B : Type u_3} [inst : NonUnitalNormedRing B] [inst_1 : NormedSpace ℝ B] [IsScalarTower ℝ B B] [SMulCommClass ℝ B B]
  (a : B) [CompactSpace ↑(quasispectrum ℝ a)], IsCompact (quasispectrum NNReal a)