Amazon’s Black Friday sale is still live, and we’ve sifted through the bogus discounts to surface truly great deals on ...

The holiday-deals hype is in full swing, and we’ve curated a list of the best discounts on Wirecutter’s top-rated products.

Without internal work ( u = 0), convergence of automatic operations to controlled standards occurs only if the memory parameter λ is sufficiently high and the sensitivity parameter g' g ′ is moderate.