Gala (apple) total volume of the commercial production of eating apples grown in the UK, often replacing Cox's Orange Pippin. Many sports of Gala have been selected, mostly for increased red color, including the popular "Royal Gala". The original cultivar produced fruit with orange stripes and a partial orange blush over a yellow background. Since then, several un-patented sports have been recognized. Additionally, more than twenty sports have received US plant patents: Unpatented varieties include: Auvil, Imperial Gala apples are grown from May through September in the northern hemisphere, but, like most apples, are available almost all year through the use of
History of manifolds and varieties History of manifolds and varieties The study of manifolds combines many important areas of mathematics: it generalizes concepts such as curves and surfaces as well as ideas from linear algebra and topology. Certain special classes of manifolds also have additional algebraic structure; they may behave like groups, for instance. In that case, they are called Lie Groups. Alternatively, they may be described by polynomial equations, in which case they are called algebraic varieties, and if they additionally carry a group structure, they are called algebraic groups. The term "manifold" comes from German "Mannigfaltigkeit," by Riemann. In English, "manifold" refers to