A lag system, introduced by Wang (1963), is a sort of opposite to a tag system. Lag systems allow dependence on more than just the first element, but remove only the first element (Wolfram 2002, p. 895).
Lag System
See also
Tag SystemExplore with Wolfram|Alpha
References
Wang, H. "Tag Systems and Lag Systems." Math. Ann. 152, 65-74, 1963.Wolfram, S. A New Kind of Science. Champaign, IL: Wolfram Media, p. 895, 2002.Referenced on Wolfram|Alpha
Lag SystemCite this as:
Weisstein, Eric W. "Lag System." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LagSystem.html