triangle inequality(redirected from Triangle inequality theorem)
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triangle inequality[′trī‚aŋ·gəl ‚in·i′kwäl·ə·dē]
For real or complex numbers or vectors in a normed space x and y, the absolute value or norm of x + y is less than or equal to the sum of the absolute values or norms of x and y.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.