epsilon symbols

epsilon symbols

[′ep·sə‚län ‚sim·bəlz]
(mathematics)
The symbols which are +1 if i1, i2, …, in is an even permutation of 1, 2, …, n;-1 if it is an odd permutation; and zero otherwise.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.