A portrait of the subject of homological algebra as it exists today.By decoding the above proof, we obtain the following formula for the connecting homomorphism: Let z e Hn(C), and represent it by a cycle c e Cn. Lift the cycle to b e Bn and apply d. ... Proof All we have to do is establish the ladder diagram.

Title | : | An Introduction to Homological Algebra |

Author | : | Charles A. Weibel |

Publisher | : | Cambridge University Press - 1995-10-27 |

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