Both activities, simplification and abstraction, are done purposefully. Karnaugh maps are used to facilitate the simplification of Boolean algebra functions. The overall trend was towards a simplification of administrative infrastructure. This offsets any advantage in terms of simplification of individual components. That is a simplification and a theoretical ideal. The idealized greenhouse model is a simplification. This quantity gives a convenient simplification of various gravity-related formulas. A difference may be a "simplification" of the rules. Common among these is increased freedom for simplification and maintenance of code. Sentences can also be automatically paraphrased using text simplification software. A later simplification by and uses only a single stack data structure. These are given in miller indices for simplification purposes. This simplification reduced two systems into one. They are archetypal characters distinguished by their simplification and flatness. It is a useful simplification that is often approximately valid.