Production of Silica-refractory Bricks from White Sand
نویسندگان
چکیده
منابع مشابه
Coloring Objects Built From Bricks
We address a question posed by T. Sibley and Stan Wagon. They proved that rhombic Penrose tilings in the plane can be 3-colored, but a key lemma of their proof fails in the natural 3D generalization. In that generalization, an object is built from bricks, each of which is a parellelopiped, and they are glued face-toface. The question is: How many colors are needed to color the bricks of any suc...
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ژورنال
عنوان ژورنال: American Journal of Applied Sciences
سال: 2005
ISSN: 1546-9239
DOI: 10.3844/ajassp.2005.465.468