267

Answers

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2

Generators of the kernel of multiplication of a ring

2

Colimit notation

2

Structure theorem for etale maps

2

+ functor (used to construct sheafification)'s property

1

Self-containing structures

1

Are the projection morphisms from a product of varieties necessarily open?

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analogue of a set with n binary operations

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What is the functor tensor product?

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Sheafification of a presheaf through the etale space

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Geometric interpretation of the exact sequence for the cotangent bundle of the projective space

1

How to Construct the Coproduct of Pointed Categories?

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inclusions of linear colimits into smooth manifolds

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Theme of Isbell duality

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Contravariant right exact functor?

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Subcategories of abelian categories generated by finitely many objects

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$\Phi: Hom_R(A,B) \to Hom_R(A,R)\otimes_R B$

1

What is a symmetric monoidal $(\infty,n)$-category?

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Plucker embedding in char 2

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The monoid of lists of morphisms in a category subject to commuting diagrams

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Does there exist a name for a nonassociative “category” without identities?

1

Reduced rings, idempotents and their prime spectrum

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Why is continuity required for sheaf-theoretic definitions of a structure on a space

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Reference request for category theory works which quickly prove the theorem which generalises the 1st isomorphism theorem for groups/rings/…

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Kan extensions and the yoneda embedding.

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Which R-algebras are the group ring of some group over a ring R?

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Arbitrary products of schemes don’t exist, do they?

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Why forgetful functors usually have LEFT adjoint?

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Can adjoint linear transformations be naturally realized as adjoint functors?

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Galois group of a product of polynomials

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nontrivial isomorphisms of categories