A discrete subset of 
which is closed under addition
and subtraction and which contains 
as a subset.
Integration Lattice
See also
Lattice, Point LatticeExplore with Wolfram|Alpha
References
Sloan, I. H. and Joe, S. Lattice Methods for Multiple Integration. New York: Oxford University Press, 1994.Referenced on Wolfram|Alpha
Integration LatticeCite this as:
Weisstein, Eric W. "Integration Lattice." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/IntegrationLattice.html