松驰
发表于 2025-3-25 06:28:54
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Decibel
发表于 2025-3-25 09:51:30
Vortices in Bose-Einstein CondensatesPolyhedra are three-dimensional analogues of polygons. Thus a polyhedron is a solid figure (or the surface of such a solid figure) with a finite number of plane polygonal faces, straight edges and vertices. Commonest instances of polyhedra are the pyramids (figure 1.1 (a),(b)) and the prisms (figure 1.1(c),(d)).
合同
发表于 2025-3-25 14:49:37
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CANT
发表于 2025-3-25 17:23:20
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Hyperopia
发表于 2025-3-25 22:14:19
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拖债
发表于 2025-3-26 00:17:09
https://doi.org/10.1007/978-0-8176-4550-2In chapter 9, we gave a quick proof for the finiteness of the number of RFP. However, one has an enormous number of possibilities, with varied n-gons, that have to be discarded as non-existent (see table 9.1 with row numbers four, ten, and sixteen terminating respectively at the eleventh, twenty-ninth and forty-oneth place).
ANNUL
发表于 2025-3-26 07:44:33
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古文字学
发表于 2025-3-26 10:49:27
Theorems of Euler and Descartes,In addition to the two theorems of the title we need two easy results in the sequel, which we shall dispose off first.
Common-Migraine
发表于 2025-3-26 15:12:15
The fourteen Bodies of Archimedes,We next come to the convex semi-regular polyhedra satisfying (I.) and (IV.). Plato is said to have known one of these, the cuboctahedron. This and twelve others are usually ascribed to Archimedes, though his book on them is lost. Five of these thirteen polyhedra were rediscovered by Piero della Francesca (1416–1492).
Grievance
发表于 2025-3-26 20:44:48
Finiteness of the number of convex Regular Faced Polyhedra (RFP) and the remaining cases of regularIn this chapter, we consider polyhedra II satisfying the regularity condition (I.), i.e. polyhedra whose faces are regular polygons with no further restrictions imposed on II. This leads to one of the most beautiful and difficult results in this topic. Polyhedra satisfying this regularity condition (I.) are termed . and abbreviated to ..