Key points are not available for this paper at this time.
A bstract In 8 it was shown that supertranslation and SL (2, C) SL 2 ℂ ¯ current algebra symmetries, corresponding to leading and subleading soft graviton theorems, are enough to determine the tree level MHV graviton scattering amplitudes. In this note we clarify the role of subsubleading soft graviton theorem in this context.
Banerjee et al. (Mon,) studied this question.