منابع مشابه
Core foundations of abstract geometry.
Human adults from diverse cultures share intuitions about the points, lines, and figures of Euclidean geometry. Do children develop these intuitions by drawing on phylogenetically ancient and developmentally precocious geometric representations that guide their navigation and their analysis of object shape? In what way might these early-arising representations support later-developing Euclidean...
متن کاملAlgebraic Geometry the Fundamental Ideas of Abstract Algebraic Geometry
ALGEBRAIC GEOMETRY 79 It may be advisable to give a special name to those varieties which admit every (allowable) ground field as field of definition. Obviously, these are the varieties which are defined over the prime field of the given characteristic p. I propose to call them universal varieties. The projective space and the Grassmannian varieties are examples of universal varieties. Another ...
متن کامل3 Abstract Configurations in Algebraic Geometry
An abstract (vk, br)-configuration is a pair of finite sets of cardinalities v and b with a relation on the product of the sets such that each element of the first set is related to the same number k of elements from the second set and, conversely, each element of the second set is related to the same number r of elements in the first set. An example of an abstract configuration is a finite geo...
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ژورنال
عنوان ژورنال: Nature
سال: 1894
ISSN: 0028-0836,1476-4687
DOI: 10.1038/050520a0