{"version":"1.0","type":"link","title":"Directed set - Newikis","description":"In mathematics, a directed set (or a directed preorder or a filtered set) is a preordered set in which every finite subset has an upper bound. In other words, it is a non-empty preordered set such that for any and in there exists in with and . A directed set's preorder is called a direction.","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400}