We give an explicit recursive presentation for Mihailova's sub-
group M(H) of Fn Fn corresponding to a nite, concise and Pei er aspherical
presentation H = hx1; : : : ; xn jR1; : : : ;Rmi. This partially answers a question
of R.I. Grigorchuk, [8, Problem 4.14]. As a corollary, we construct a nitely
generated recursively presented orbit undecidable subgroup of Aut(F3)
CitationBogopolski, O.; Ventura, E. A recursive presentation for Mihailova's subgroup. "Groups geometry and dynamics", 2010, vol. 4, núm. 3, p. 407-417.
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