Something that I was pondering, say we had a surjective map $$f:A \to B$$ can we always form an exact sequence: $$0 \to \text{Ker}(f) \to A \to B \to 0$$
2026-03-27 19:40:29.1774640429
Given a surjective map can we always form an exact sequence?
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Yes. The map in the middle being the usual inclusion map.