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Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.
added at exact sequence two small lemmas on forming quotients in an exact sequence
expanded and polished a bit more at exact sequence .
Added a basic proof in the Definition-section at exact sequence and added a basic example at Specific examples
Added the notion of an exact sequence of pointed sets.
Thanks for all your additions!
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