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brane comparison table

Subject	is a kind of	has definition
string theory	unified theory	Theory that subatomic particles actually have extension along one axis, and that their properties are determined by the arrangement and vibration of the strings.
brane	string theory	Any of the extended objects that arise in string theory. A one-brane is a string, a two-brane is a membrane, a three-brane has three extended dimensions, etc. More generally, a p-brane has p spatial dimensions.

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