Lecture

Exact Sequences in Abelian Groups

Description

This lecture covers the concept of exact sequences in abelian groups, focusing on split exact sequences. It explains the existence of sections and retractions in a split exact sequence, providing Lemmas 2.3 and 2.4 as key results. The lecture also introduces the notion of homomorphism retraction and its implications in determining whether a sequence is split exact.

Official source

https://mediaspace.epfl.ch/media/0_9r1274k3

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