Fruit salad fruit salads include strawberries, pineapple, honeydew, watermelon, grapes, and kiwifruit. Various recipes may call for the addition of nuts, fruit juices, certain vegetables, yogurt, or other ingredients. One variation is a Waldorf-style fruit salad, which uses a mayonnaise-based sauce. Other recipes use sour cream (such as in ambrosia), yogurt or even mustard as the primary sauce ingredient. A variation on fruit salad uses whipped cream mixed in with many varieties of fruits (usually a mixture of berries), and also often include miniature marshmallows. Rojak, a Malaysian fruit salad, uses a spicy sauce with peanuts and shrimp paste. In the Philippines,
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