Heaviside unit function
Heaviside unit function
[′hev·ē‚sīd ′yü·nət ¦fəŋk·shən] (mathematics)
The real function ƒ(x) whose value is 0 if x is negative and whose value is 1 otherwise.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.