Complex sentence: The discrete version can be defined on any graph, usually a lattice in "d"-dimensional Euclidean space, the continuum version is defined on\\ mathbb ^ d or on a bounded domain of that.
Split into simpler sentences: The discrete version can be defined on any graph, usually a lattice in "d"-dimensional Euclidean space. The continuum version is defined on\\ mathbb ^ d or on a bounded domain of that.