Free Resolutions and Change of Rings
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Srikanth Iyengar
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Article
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1997
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Elsevier Science
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English
⚖ 270 KB
Projective resolutions of modules over a ring R are constructed starting from appropriate projective resolutions over a ring Q mapping to R. It is shown that such resolutions may be chosen to be minimal in codimension F 2, but not in codimension 3. This is used to obtain minimal resolutions for esse