Sun Dan may refer to:
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Sun Guangyuan
Sun Guangyuan (, 1900–1979), also known as Sun Tang (孫鎕), was a Chinese mathematician.
He studied projective geometry under Ernest Preston Lane at the University of Chicago. Later Sun became a professor in Tsinghua University, Beijing.
S ...
(1900–1979), Chinese mathematician
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Sun Dan (gymnast) (born 1986), Chinese rhythmic gymnast
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Sun Dan (swimmer) (born 1985), Chinese former swimmer
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