1993/04/28 by A. M. Polyakov, Polyakov, A. M.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #hep-th
paper · pdf · doi:10.48550/arxiv.hep-th/9304146
18 pages, latex (references added)
arxiv created 1993/04/30 · arxiv updated 2009/11/30
In these lectures I discuss various unsolved problems of string theory and their relations to quantum gravity, 3d Ising model, large N QCD, and quantum cosmology. No solutions are presented but some new and perhaps useful approaches are suggested.