منابع مشابه
The Orchard Morphism
We describe and prove uniqueness of a natural homomorphism (called the Orchard morphism) between some groups associated to finite sets.
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چکیده ندارد.
15 صفحه اولSensory Evolution: Trouble in the Cherry Orchard
Understanding how and why some species become pests, while their relatives remain harmless, might help us control them. A new study looks at how sensory mechanisms evolved in an emerging pest fly species.
متن کاملOn Pólya’s Orchard Problem
In 1918 Pólya formulated the following problem: “How thick must the trunks of the trees in a regularly spaced circular orchard grow if they are to block completely the view from the center?”(Pólya and Szegő [2]). We study a more general orchard model, namely any domain that is compact and convex, and find an expression for the minimal radius of the trees. As examples, solutions for rhombus-shap...
متن کاملAn Orchard Theorem
We describe a natural way to plant cherryand plumtrees at prescribed generic locations in an orchard.
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ژورنال
عنوان ژورنال: The Iowa Review
سال: 1979
ISSN: 0021-065X,2330-0361
DOI: 10.17077/0021-065x.2440