EntityQ21175464· pop 5· linked from 109 articlesG+Sign in to savejefree EpstConnectionstype II string theoryEntityhistory of string theoryEntitystring theoryEntityvertex operator algebraEntityblack braneEntityBlack holeConceptquantum mechanicsEntityInternational Standard Book NumberEntitydigital object identifierEntitycoordinate systemEntityplaneEntityDavid GrossEntityCartesian coordinate systemEntityGerard 't HooftEntityholographyEntitymultiverseEntitycommutative propertyEntitygravitonEntityMichio KakuEntitybibcodeEntityCategoriesLeonard SusskindString theory