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《Mathematics in Practice and Theory》 2018-18
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The Surfaces of Revolution with Lightlike Axis in Minkowski 3-space

JIN Ming-hao;JIN Xiang-qin;DONG Yan-qin;School of Mathematics,Changchun Normal University;Jilin Fisheries Research Institute, Institute of Fisheries Ecology;  
The paper proposes a new approach to define the angle in the Minkowski plane,and gives new angle in the Minkowski plane which is close to that in the Euclidean space.Meanwhile, the angleproblem of light like vector is solved. In the end, the paper gives the pseudo Pythagorean theorem based on the angle in the Minkowski space.
【Fund】: 吉教科合字[2016]第389号;吉教科合字[2015]第363号
【CateGory Index】: O182
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