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《College Mathematics》 2015-01
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New Theory on the Existence of Plane Which Intersects with Quadric Surfaces in a Circle

JING Jin;College of Mathematics and Statistics,Central China Normal University;Mathematics Department of Public,Hankou University;  
Using the characteristic that plane intersects with sphere in a circle,this article studied the existence of plane which intersects with ellipsoid,hyperboloid,parabolic surfaces in a circle.Especially,we introduce an easier method to prove this existence result.
【CateGory Index】: O182.2-4;G652
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