Obituary: P. D. Khera (13 April 1928–23 September 2019)

Obituary: Mitchell P. Fink

Fig. 1 Mitchell P. Fink Mitchell P. Fink, MD (Fig. 1), one of the most inspiring and influential leaders in the field of intensive care medicine, died at 66 years of age on 17 November 2015 after being diagnosed this summer with an aggressive sarcoma. This devastating news has left many of us with a huge sense of loss and sadness. Mitch graduated from the Washington University School of Medicin...

Cover Vol 16, No. 2, April 2019

of April 13 , 2017 . This

of April 13 , 2017 . This

Lecture 12 : April 13 , 2017

Last Time During the last lecture we completed an argument for a 2 1 d−1 ) lower bound for depth-d circuits for parity (PAR) using Hastad’s Switching Lemma [H̊as87], which stated that, for f : {0, 1} → {−1, 1}, if CNFwidth(f) = t, Pρ←Rp(DNFwidth(f ρ) = s) ≥ (7ps) We proved the Weak Switching Lemma, asserting a (40ps2) lower bound for this probability as opposed to the tighter bound given by the ...