Dec 29, 2019
In a short exact sequence of vector fields 0 → A → B → C→ 0,B must be the direct sum B=A⊕C of the subgroup A and the quotient group C=B/A.
Allen Hatcher
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In a short exact sequence of vector fields 0 → A → B → C→ 0,B must be the direct sum B=A⊕C of the subgroup A and the quotient group C=B/A.
Allen Hatcher