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We show how a stress-energy pseudotensor can be constructed intwo-dimensional dilatonic gravity theories (classical, CGHS and RST) and derivethe expression for the ADM mass in these theories from it. We define the Bondimass for these theories by using the pseudotensor formalism. The resultingexpression is the generalization of the expression for the ADM mass. Theboundary condition needed for the energy conservation is also investigated. Itis shown that under appropriate boundary conditions, our definition of theBondi mass is exactly the ADM mass minus the matter radiation energy at nullinfinity.Comment: 11 pages, latex, no figure

ADM MASS, BONDI MASS, AND ENERGY CONSERVATION IN TWO-DIMENSIONAL DILATON GRAVITIES