Fig. 4
From: A geometric formulation to measure global and genuine entanglement in three-qubit systems

The type 3b-i states (12) are associated with the two-dimensional convex subsets that are different from the faces of the tetrahedra that form the polytope \(\mathcal {P}\). (a) Type 3b-1. (b) Type 3b-2. (c) Type 3b-3.