Sign lemma for dimension shifting

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dc.creatorNitsure, Nitin
dc.date2007-06-15
dc.date.accessioned2026-07-07T08:10:24Z
dc.date.available2026-07-07T08:10:24Z
dc.descriptionThere is a surprising occurrence of some minus signs in the isomorphisms produced in the well-known technique of dimension shifting in calculating derived functors in homological algebra. We explicitly determine these signs. Getting these signs right is important in order to avoid basic contradictions. We illustrate the lemma by some de Rham cohomology and Chern class considerations for compact Riemann surfaces.
dc.description7 pages, LaTeX
dc.identifierhttps://arxiv.org/abs/0706.2250
dc.identifierhttp://arxiv.org/abs/0706.2250
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/131815
dc.subjectAlgebraic Geometry
dc.subjectAlgebraic Topology
dc.subject14F99, 18G10
dc.titleSign lemma for dimension shifting
dc.typetext

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