We construct a Lipschitz-free space that is locally almost square but not weakly square; this the first example of such Banach space. also prove result, which indicates geodesic metric spaces are potential characterization for spaces. Lastly, we can have symmetric strong diameter 2 property.

We prove that Alexandrov spaces X of nonnegative curvature have Markov type 2 in the sense of Ball. As a corollary, any Lipschitz continuous map from a subset of X into a 2-uniformly convex Banach space is extended as a Lipschitz continuous map on the entire space X.

Here Lipschitz conditions are used as a primary tool, for studying curves in metric spaces in particular.