commutative diagram

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commutative diagram

[¦käm·yə‚tād·iv ′dī·ə‚gram]
(mathematics)
A diagram in which any two mappings between the same pair of sets, formed by composition of mappings represented by arrows in the diagram, are equal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.