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The non-orientable genus, demigenus, or Euler genus of a connected, non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ, via the relationship χ = 2 − k , where k is the non-orientable genus.
The genus (sometimes called the demigenus or Euler genus) of a connected non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ, via the relationship χ = 2 − g, where g is the non-orientable ...
Descartes on Polyhedra: A Study of the "De solidorum elementis" is a book in the history of mathematics, concerning the work of René Descartes on polyhedra.Central to the book is the disputed priority for Euler's polyhedral formula between Leonhard Euler, who published an explicit version of the formula, and Descartes, whose De solidorum elementis includes a result from which the formula is ...
Created Date: 8/30/2012 4:52:52 PM
Download as PDF; Printable version; In other projects ... is the Euler characteristic of the structure sheaf ... (Reprint of the 2nd, corr. print. of the 3rd ed.). ...
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abundant offshore wind resources and provide enough pollution-free power to meet 75% of the comparable electricity demand of Cape Cod and the islands of Martha’s Vineyard and Nantucket. Second, as the devastating impacts of Hurricane Sandy linger throughout much of
7 Introduction D id your mother remind you to take off your coat when inside or you wouldn’t ‘feel the benefit’ when you leave? Have you ever been informed that what you need to cool