Maldacena 1997 + GKP 1998 + Witten 1998: N=4 SYM_4 in 4d = type-IIB string on AdS_5 x S^5; gauge-gravity duality + holographic-renormalization-group.
Maldacena 1997 + GKP 1998 + Witten 1998: N=4 SYM_4 in 4d = type-IIB string on AdS_5 x S^5; gauge-gravity duality + holographic-renormalization-group.