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The model of inflation with a single tachyon field generates larger anisotropy and has difficulties in describing the formation of the Universe L. Kofman and A. Linde, J. High Energy Phys. 07, 004 (2002). In this paper we consider a model with multitachyon fields and study the assisted inflationary solution. Our results show that this model satisfies the observations.
Piao et al. (Mon,) studied this question.