equivalence

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equivalence

[i′kwiv·ə·ləns]
(mapping)
In an equal-area map projection, the property of having the ratio between areas on the map the same as the ratio between corresponding areas on the earth's surface.
(mathematics)
A logic operator having the property that if P, Q, R, etc., are statements, then the equivalence of P, Q, R, etc., is true if and only if all statements are true or all statements are false.
References in periodicals archive ?
Zentall, Edwards, and Hogan (1983) among others have found minimally complex equivalence relations in pigeons (see Zentall & Urcuioli, 1993: this issue).