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Martingale
Definitions
- 1 A piece of harness used on a horse to keep it from raising its head above a desired point.
- 2 spar under the bowsprit of a sailboat wordnet
- 3 A spar, or piece of rigging that strengthens the bowsprit.
- 4 a harness strap that connects the nose piece to the girth; prevents the horse from throwing back its head wordnet
- 5 A stochastic process for which the conditional expectation of future values given the sequence of all prior values is equal to the current value.
"If a gambler plays a fair game repeatedly, his payoff over time is a martingale."
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- 6 A gambling strategy in which one doubles the stake after each loss.
- 7 A strap attached to the sword handle, preventing a sword being dropped if disarmed.
- 1 To employ the martingale strategy in gambling.
"The Russians were both martingaling it—doubling their bets when they lost."
Etymology
From Middle French martingale, from Occitan martegalo, feminine form of martegal, an inhabitant of Martigues, which is from Latin maritima. Alternatively from Spanish almártaga. The meaning in gambling may come from an old usage of "à la martingale" to mean absurdly, foolishly.https://people.math.harvard.edu/~ctm/home/text/class/sem/html/home/notes/martingales/martingales.pdf
From Middle French martingale, from Occitan martegalo, feminine form of martegal, an inhabitant of Martigues, which is from Latin maritima. Alternatively from Spanish almártaga. The meaning in gambling may come from an old usage of "à la martingale" to mean absurdly, foolishly.https://people.math.harvard.edu/~ctm/home/text/class/sem/html/home/notes/martingales/martingales.pdf
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