Open Map

In topology, an open map is a function between two topological spaces which maps open sets to open sets. That is, a function f : X → Y is open if for any open set U in X, the image f(U) is open in Y. Likewise, a closed map is a function which maps closed sets to closed sets. The concept of a closed map should not be confused with that of a closed operator. Besides, an open map needs not be closed and vice versa.Neither open nor closed maps are required to be continuous. Although their definitions seem more natural, open and closed maps are much less important than continuous maps.
Posts about Open Map
  • Managing Unified Campaigns Through Bing Ads for Better ROI

    … and destination URLs. Other ways in which you can customize an ad to appeal to mobile searchers include: Click-to-call ads via call extensions, which enable customers to open a call dialogue box directly from your ad Click-to-direction ads via location extensions, which enable customers to open map app-based directions to the business location you…

    Gabe Kwakyi/ The SEM Postin Affiliate- 17 readers -
Get the top posts daily into your mailbox!