| QUILLEN MODEL STRUCTURES FOR RELATIVE HOMOLOGICAL ALGEBRA (2007) | |||||||||||||||||
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| of the ring R. This example shows that traditional homological algebra is encompassed by Quillen's homotopical algebra. The goal of this paper is to show that more general forms of homological algebra also t into Quillen's framework. Speci cally, a projective class on a complete and cocomplete abelian category A is exactly the information needed to do homological algebra in A. The main result is | |||||||||||||||||
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