We prove here that for any pair of regular Canter sets in the line, either its arithmetic sum has Lebesgue measure zero or the pair can be approximated (through the image of a smooth diffeomorphism) by another one whose arithmetic sum contains an interval. The latter occurs when the Hausdorff dimension of the product of the sets is bigger than one.
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Huazhong Univ Sci & Technol, Sch Math & Stat, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, Sch Math & Stat, Wuhan 430074, Peoples R China
Wen, Zhi-Xiong
Zhang, Jie-Meng
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Huazhong Univ Sci & Technol, Sch Math & Stat, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, Sch Math & Stat, Wuhan 430074, Peoples R China
Zhang, Jie-Meng
Wu, Wen
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Hubei Univ, Fac Math & Stat, Hubei Key Lab Appl Math, Wuhan 430062, Peoples R China
Univ Oulu, Dept Math Sci, Oulu 90014, FinlandHuazhong Univ Sci & Technol, Sch Math & Stat, Wuhan 430074, Peoples R China
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Amirkabir Univ Technol, Tehran Polytech, Fac Math & Comp Sci, Tehran 15914, IranAmirkabir Univ Technol, Tehran Polytech, Fac Math & Comp Sci, Tehran 15914, Iran