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guang yi williams wen ti yu chebyshev duo xiang shi
YANG Shi-jun;ZHANG Ming - lei;HOU Zhi - fang (Dept.of Mathematies .Hangzhou Teachers Colleg;Hangzhou 310012;China;ept of Mathematics .Jining Tecachers’ College;Shandong;China;Basic Department;Changzhou Industry and Technology College;Changzhou 213
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