Durif of the officially sanctioned grapes of the Côtes du Rhône AOC, Petite Sirah's linking to Durif caused the California's Rhone Rangers to add the grape to its listings of wine in 2002. In Israel, Petite Sirah had a history much like that in California—historically used as a blending grape to add body to inferior wines. However, Petite Sirah has recently experienced somewhat of a revival, both in high-end blends and bottled as a single or majority variety. The UC Davis-trained winemaker and Ph.D. chemist Ya'ir Margalit, familiar with the grape from his time in California, showed that Petite Sirah need
History of manifolds and varieties spaces with a differentiable or topological structure, while "variety" refers to spaces with an algebraic structure, as in algebraic varieties. In Romance languages, manifold is translated as "variety" – such spaces with a differentiable structure are literally translated as "analytic varieties", while spaces with an algebraic structure are called "algebraic varieties". Thus for example, the french word "" means topological manifold. In the same vein, the Japanese word "" (tayōtai) also encompasses both manifold and variety. ("" (tayō) means various.) Ancestral to the modern concept of a manifold were several important results of 18th and 19th century mathematics. The oldest