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Exterior algebra
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=== Generalizations === Given a [[commutative ring]] <math>R</math> and an <math>R</math>-[[module (mathematics)|module]] {{tmath|M}}, we can define the exterior algebra <math>{\textstyle\bigwedge}(M)</math> just as above, as a suitable quotient of the tensor algebra {{tmath|\mathrm{T}(M)}}. It will satisfy the analogous universal property. Many of the properties of <math>{\textstyle\bigwedge}(M)</math> also require that <math>M</math> be a [[projective module]]. Where finite dimensionality is used, the properties further require that <math>M</math> be [[finitely generated module|finitely generated]] and projective. Generalizations to the most common situations can be found in {{harvtxt|Bourbaki|1989}}. Exterior algebras of [[vector bundle]]s are frequently considered in geometry and topology. There are no essential differences between the algebraic properties of the exterior algebra of finite-dimensional vector bundles and those of the exterior algebra of finitely generated projective modules, by the [[Serre–Swan theorem]]. More general exterior algebras can be defined for [[sheaf (mathematics)|sheaves]] of modules.
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