EntityQ1064342· pop 14· linked from 31 articlessnake lemmaSign in to savetool used in mathematicsConnectionsexact sequenceEntitymathematicsEntitysnakeEntityInternational Standard Book NumberEntityvector spaceEntityringEntityfieldEntityabelian groupEntitysurjective functionEntityMichael AtiyahEntityalgebraic topologyEntityJill ClayburghEntitymoduleEntityMathWorldEntityhomological algebraEntitycyclic groupEntitysymmetric groupEntityEric W. WeissteinEntitycommutative diagramEntitySerge LangEntityCategoriesHomological algebraLemmas in category theory