From thirty feet away, Fletcher yelled 'Hey, Snapperhead! What the fuck are you doing?'

The concept of convex envelopes of nonconvex functions is a basic tool in theory and algorithms of global optimization, see e.g., Falk and Hoffman (1976), Horst and Tuy (1996), Horst et al. (2000).

in the faces of these guilty collybists

So there, my dear Bertie, was I, within a few hours of my entrance into this town, with my top-hat down to my ears, my highly professional frock-coat, and my kid gloves, fighting some low bruiser on a pedestal in one of the most public places, in the heart of a yelling and hostile mob! I ask you whether that was cruel luck or not?