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Subgroups of Z

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This video deals with the subgroups of Z and their cosets. In my experience , many students are not aware of these facts though the first example of a group is Z! When I show them that the cosets of the subgroups of Z are objects known to them from high school and again from number theory, they are excited. Hope many of the viewers also get excited.
Even if you think you know well, watch the video from 42:00 onwards. Have you thought about these earlier?
Please post your comments below.
Even if you think you know well, watch the video from 42:00 onwards. Have you thought about these earlier?
Please post your comments below.
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