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  • 06-01-2024
  • Mathematics
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Giả sử A là miền nguyên và mỗi nhóm con của nhóm cộng của A là ideal của A. Chứng minh rằng A đẳng cấu với vành số nguyên Z hoặc A đẳng cấu với vành Zp các số nguyên mod p (p là số nguyên tố).

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