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Paper   IPM / Physic / 6519
School of Physics
  Title:   2-D Gravity as A Limit of the SL(2,R) Black Hole
1.  M. Alimohammadi
2.  F. Ardalan
  Status:   Published
  Journal: Mod. Phys. Lett. A
  No.:  36
  Vol.:  10
  Year:  1995
  Pages:   2485-2494
  Supported by:  IPM
The transformation of the SL(2,\BbbR)/ U(1) black hole under a boost of the subgroup U(1) is studied. It is found that the tachyon vertex operators of the black hole go into those of the c=1 conformal field theory coupled to gravity. The discrete states of the black hole also tend to the discrete states of the 2-D gravity theory. The fate of the extra discrete states of the black hole under boost are discussed

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