Ploughman's lunch 29 April 1958 refer to a ploughman's lunch consisting of bread, cheese and pickle. The meal's rise in popularity during the 1970s has been argued to be at least partially based on a British cultural "revulsion from technology and modernity and a renewed love-affair with an idealised national past". The meal was, however, primarily favoured by caterers because it was simple to prepare, required no cooking, was not labour-intensive and involved no meat, meaning there was the potential of high profit margins. The 1983 film "The Ploughman's Lunch", from a screenplay by Ian McEwan, has a subtext that is "the
No free lunch with vanishing risk No free lunch with vanishing risk No free lunch with vanishing risk (NFLVR) is a no-arbitrage argument. We have "free lunch with vanishing risk" if by utilizing a sequence of time self-financing portfolios which converge to an arbitrage strategy, we can approximate a self-financing portfolio (called the "free lunch with vanishing risk"). For a semimartingale "S", let formula_1 where a strategy is admissible if it is permitted by the market. Then define formula_2. "S" is said to satisfy "no free lunch with vanishing risk" if formula_3 such that formula_4 is the closure of "C" in the norm topology of formula_5.