Names for the number 0 in English a formal reading of a team's scoresheet. There is no definitive origin for the tennis score name for 0, "love". It firstly occurred in English, is of comparatively recent origin, and is not used in other languages. The most commonly believed hypothesis is that it is derived from English speakers mis-hearing the French "l'œuf", "the egg", which was the name for a score of zero used in French, because the symbol for a zero used on the scoreboard was an elliptical zero symbol, which visually resembled an egg. There is tangential support for this in the use of "duck" as
Zero-sum game a situation in which the interacting parties' aggregate gains and losses can be less than or more than zero. A zero-sum game is also called a "strictly competitive" game while non-zero-sum games can be either competitive or non-competitive. Zero-sum games are most often solved with the minimax theorem which is closely related to linear programming duality, or with Nash equilibrium. The zero-sum property (if one gains, another loses) means that any result of a zero-sum situation is Pareto optimal. Generally, any game where all strategies are Pareto optimal is called a conflict game. Zero-sum games are a specific example of