The 1 may be replaced, for example, by infinity or by or any other subadditive function of . This quasimetric describes the cost of modifying a metal stick: it is easy to reduce its size by filing it down, but it is difficult or impossible to grow it.
The 1 may be replaced, for example, by infinity or by or any other subadditive function of . This quasimetric describes the cost of modifying a metal stick it is easy t:o reduce its size by filing it down, but it is difficult or impossible to grow it.