Fortified wine because he was inspired by a German wine flavoured with wormwood, an herb most famously used in distilling absinthe. However, wine flavoured with wormwood goes back to ancient Rome. The modern German word "Wermut" ("Wermuth" in the spelling of Carpano's time) means both "wormwood" and "vermouth". The herbs were originally used to mask raw flavours of cheaper wines, imparting a slightly medicinal "tonic" flavor. Vins doux naturels are lightly fortified wines typically made from white Muscat grapes or red Grenache grapes in the south of France. The production of vins doux naturels was perfected by Arnaud de Villeneuve at the
Additive function Additive function In number theory, an additive function is an arithmetic function "f"("n") of the positive integer "n" such that whenever "a" and "b" are coprime, the function of the product is the sum of the functions: An additive function "f"("n") is said to be completely additive if "f"("ab") = "f"("a") + "f"("b") holds "for all" positive integers "a" and "b", even when they are not co-prime. Totally additive is also used in this sense by analogy with totally multiplicative functions. If "f" is a completely additive function then "f"(1) = 0. Every completely additive function is additive, but not