Artemisia (genus) as a remedy against hangovers and nightmares. "Artemisia absinthium" is used to make the highly potent spirits absinthe. Malört also contains wormwood. The aperitif vermouth (derived from the German word "Wermut", "wormwood") is a wine flavored with aromatic herbs, but originally with wormwood. "Artemisia arborescens" (tree wormwood, or "sheeba" in Arabic) is an aromatic herb indigenous to the Middle East used in tea, usually with mint. A few species are grown as ornamental plants, the fine-textured ones used for clipped bordering. All grow best in free-draining sandy soil, unfertilized, and in full sun. "Artemisia stelleriana" is known as Dusty Miller,
Additive number theory problems as well). Examples of this type include the Erdős–Heilbronn Conjecture (for a restricted sumset) and the Cauchy–Davenport Theorem. The methods used for tackling such questions draw from across the spectrum of mathematics, including combinatorics, ergodic theory, analysis, graph theory, group theory, and linear algebraic and polynomial methods. Additive number theory In number theory, the specialty additive number theory studies subsets of integers and their behavior under addition. More abstractly, the field of "additive number theory" includes the study of abelian groups and commutative semigroups with an operation of addition. Additive number theory has close ties to combinatorial number theory