submartingale
English
Etymology
sub- + martingale
Noun
submartingale (plural submartingales)
- (mathematics) A stochastic process for which the conditional expectation of future values given the sequence of all prior values is bounded below by the current value.
- If a gambler repeatedly plays a game with positive expectation, his payoff over time is a submartingale.
Usage notes
A submartingale is a martingale if and only if it is also a supermartingale.
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