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发表于 2025-3-21 16:06:43
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发表于 2025-3-21 20:45:37
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Perigee
发表于 2025-3-22 03:50:26
Exercises in Basic Ring Theory978-94-015-9004-4Series ISSN 0927-4529
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镶嵌细工
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镶嵌细工
发表于 2025-3-22 19:01:17
Introduction: Second Nature and Naturalism,Let . a ring homomorphism. If the rings have identity . is called . if .(1) = 1’.
半导体
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Functional
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发表于 2025-3-23 06:08:34
A ring homomorphism . is called . if it is bijective (an isomorphism) and . (an endomorphism).