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S={0,1},*为普通乘法,则< S , * >是( )。
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S={0,1},*为普通乘法,则< S , * >是( )。
A、半群,但不是独异点
B、只是独异点,但不是群
时间:2021-09-01 20:46
关键词:
联大
河南理工大学
计算机科学与技术
离散数学
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B
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