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Related to additive inverse: multiplicative inverse
additive inverse[′ad·ə·div ′in‚vərs]
In a mathematical system with an operation of addition denoted +, an additive inverse of an element e is an element -e such that e + (-e) = (-e) + e = 0, where 0 is the additive identity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.