Needed Reals and Recursion in Generic Reals ... - Mathematics

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Theorem 3 (Jockusch, Solovay) Th e following fiv e s tate m e n t s a r e equ iv- a l e n t , for a ny r ea l a. 1. Th e
           ! " $# %&')(+*-,./102,.+. 3 ,5476)*98:,;4=9.A@B*DCE,F(G478H*-&I4 J &