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2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry book bundles calculus categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration foundation foundations functional-analysis functor gauge-theory gebra geometric-quantization geometry graph graphs gravity grothendieck group group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory infinity integration integration-theory k-theory lie-theory limits linear linear-algebra locale localization logic manifolds mathematics measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nlab noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pages pasting philosophy physics pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry scheme schemes set set-theory sheaf simplicial space spin-geometry stable-homotopy-theory stack string string-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal variational-calculus

1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeSep 27th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded pointer to: * [[Peter Hilton]], [[Urs Stammbach]], Section I.9 in: _A course in homological algebra_, Springer-Verlag, New York, 1971, Graduate Texts in Mathematics, Vol. 4 ([doi](https://link.springer.com/book/10.1007/978-1-4419-8566-8), [pdf](https://web.math.rochester.edu/people/faculty/doug/otherpapers/hilton-stammbach.pdf)) <a href="https://ncatlab.org/nlab/revision/diff/injective+envelope/14">diff</a>, <a href="https://ncatlab.org/nlab/revision/injective+envelope/14">v14</a>, <a href="https://ncatlab.org/nlab/show/injective+envelope">current</a>

   added pointer to:

   • Peter Hilton, Urs Stammbach, Section I.9 in: A course in homological algebra, Springer-Verlag, New York, 1971, Graduate Texts in Mathematics, Vol. 4 (doi, pdf)

   diff, v14, current

2. • CommentRowNumber2.
   • CommentAuthorSeth Chaiken
   • CommentTimeAug 7th 2022
   • PermaLink
   Author: Seth Chaiken
   Format: MarkdownItexIt looks like injective hull is synonymous with injective envelope. The article uses hull as the "primary" word, and then has (envelope), but injective envelop is the title. How can both forms be put into the title?

   It looks like injective hull is synonymous with injective envelope. The article uses hull as the “primary” word, and then has (envelope), but injective envelop is the title. How can both forms be put into the title?