That correspondence was shown in part due to the work of Juan Maldacena, and one problem in it is the discovery of its namesake landscape, which consists of something like 10 to the 500th power metastable vacua.
Important quantities in it include the Nambu-Goto action and the Polyakov action, while one of its most important results is the AdS/CFT [read as initials] correspondence. That correspondence was shown in part due to the work of Juan Maldacena, and one problem in it is the discovery of its namesake landscape, which consists of something like 10 to the 500th power metastable vacua. Another of its important results is that the 5 consistent theories of this type could all be viewed as a limit of a single M-theory, due to Edward Witten. FTP, name this theory of physics, which predicts that we live in 26 space-time dimensions in the bosonic version, or 10 dimensions in its 'super' version, and which gets its name from the fact that its elementary building block is no longer an elementary point like particle, but rather a 1 dimensional object.
Important quantities in it include the Nambu-Goto action and the Polyakov action, while one of its most important results is the AdS/
superstring theory