so let H = { 0, 3, 6} under Z(9), and I need to find a + H.(adsbygoogle = window.adsbygoogle || []).push({});

the book shows

0 + H = 3 + H = 6 + H

1 + H = 4 + H = 7 + H

2 + H = 5 + H = 8 + H.

I"m not understanding why they start with 0, 1, 2. what gives that away?

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# Question about cosets

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