Reciprocal may refer to: Wikipedia does not have an article with this exact name. ... It has been suggested that French Wiktionary be merged into this article or section. ...
Reciprocal altruism, a form of symbiotic relationship in evolutionary biology
The reciprocal function: y = 1/x. ... In calculus, the reciprocal rule is a shorthand method of finding the derivative of a function that is the reciprocal of a differentiable function, without using the quotient rule or chain rule. ... In crystallography, the reciprocal lattice of a Bravais lattice is the set of all vectors K such that for all lattice point position vectors R. The reciprocal lattice is itself a Bravais lattice, and the reciprocal of the reciprocal lattice is the original lattice. ... A reciprocal is a linguistic structure that marks a particular kind of relationship between grammatical agents. ... Albert Banduras belief that a persons behavior is both influenced by and is influencing a persons personal factors and the environment. ... In evolutionary biology, reciprocal altruism is a form of altruism in which one organism provides a benefit to another in the expectation of future reciprocation. ...
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{Reciprocal proportion} (Math.), a proportion such that, of four terms taken in order, the first has to the second the same ratio which the fourth has to the third, or the first has to the second the same ratio which the reciprocal of the third has to the reciprocal of the fourth.
{Reciprocal ratio} (Math.), the ratio between the reciprocals of two quantities; as, the reciprocal ratio of 4 to 9 is that of 3/4 to 1/9.
The reciprocal of a fraction is the fraction inverted, or the denominator divided by the numerator.
Reciprocal altruism is a form of altruism in which one organism provides a benefit to another in the expectation of future reciprocation.
An example of reciprocal altruism is blood-sharing in the vampire bat, in which bats feed regurgitated blood to those who have not collected much blood themselves knowing that they themselves may someday benefit from this same donation; cheaters are remembered by the colony and ousted from this collaboration.
If cheating is detected then reciprocity will end, at considerable cost to the cheater, therefore "the cheater should be selected to make up for his misdeed and to show convincing evidence that he does not plan to continue his cheating sometime in the future".
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