Supplementary reading for this course:
J. Maldacena, S.H. Shenker and D. Stanford, "A bound on chaos," arXiv:1503.01409 [hep-th].
S.H. Shenker and D. Stanford, "Stringy effects in scrambling," arXiv:1412.6087 [hep-th].
D.A. Roberts, D. Stanford and L. Susskind, "Localized shocks," arXiv:1409.8180 [hep-th].
