Download PDF by Peter J. Hilton, Urs Stammbach: A Course in Homological Algebra

0 where A ~ C is to be regarded as fixed, and B is an essential extension of A. Show that if T(B) and F(B) are maximal, so is B. Show that if B is maximal, so is T(B), but that F(B) may fail to be maximal. 9. Essential Extensions 39 Show that if C is divisible, so are 7{C) and F(C).

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A Course in Homological Algebra by Peter J. Hilton, Urs Stammbach


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