A characterization of convex subsets of normed spaces.Kodai Math. Sem. Rep. 25 (1973), 307–320], and many other papers. Some well known examples of concrete convex structures are reexamined and the ...

We give a proof of the A2 conjecture in geometrically doubling metric spaces (GDMS), that is, a metric space where one can fit no more than a fixed amount of disjoint balls of radius r in a ball of ...