𝔖 Bobbio Scriptorium
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On n-presented modules and almost excellent extensions ∗

✍ Scribed by Xue, Weimin


Book ID
126580126
Publisher
Taylor and Francis Group
Year
1999
Tongue
English
Weight
315 KB
Volume
27
Category
Article
ISSN
0092-7872

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On Degenerations and Extensions of Finit
✍ Klaus Bongartz 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 996 KB

We derive a cancellation theorem for degenerations of modules that says in particular, that projective or injective common direct summands can always be neglected. Combining the cancellation result with the existence of almost split sequences we characterize the orbit closure of a module living on p