 This gives an approximation ratio of 2.860 + \epsilon for 3D BP with rotations, which improves upon the current best-known algorithm .
<clarity>  This gives an approximation ratio of 2.860 + \epsilon for 3D BP with rotations, which improves upon the current best-known algorithm .
 This gives an approximation ratio of 2.860 + \epsilon for 3D BP with rotations, which improves upon the best-known algorithm .