Nisnevich topology

E884926

The Nisnevich topology is a Grothendieck topology on schemes tailored to capture étale-local algebraic information while ensuring strong local lifting properties over points.

All labels observed (5)

Label Occurrences
Nisnevich cd-structure 1
Nisnevich cohomology 1
Nisnevich descent 1

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf Grothendieck topology
topology on schemes
appliesTo general schemes
schemes of finite type over a base
arisesFrom Nisnevich cd-structure
linked to: Nisnevich topology
associatedWith distinguished Nisnevich squares
excision squares in K-theory
baseChangeBehavior stable under base change of schemes
characterizedBy distinguished squares
pointwise lifting property for étale morphisms
coarserThan étale topology
comparedWith Zariski topology
étale topology
compatibleWith étale-local algebraic information
coveringFamilyCondition for every point of the base there exists a point in some cover with isomorphic residue field and mapping to it
coversGivenBy families of étale morphisms satisfying residue field isomorphism conditions
definedOn category of schemes
category of schemes over a base scheme
ensures existence of sections after refinement around points
strong local lifting properties over points
generalizes Zariski open covers via étale refinements
hasProperty enough points
finer than Zariski but not as fine as étale
subcanonical
introducedBy Yevsey Nisnevich NERFINISHED
morphismCondition covers consist of jointly surjective families of étale morphisms with residue field lifting
motivation to capture étale-local behavior while improving pointwise lifting properties
refines Zariski topology
relatedConcept cd-structure
supports descent for algebraic K-theory
excision in algebraic K-theory
typicalCover étale morphism admitting sections over all residue fields of the base
usedFor comparison of algebraic and topological K-theory in certain settings
construction of homotopy invariant sheaves
localization arguments in motivic homotopy
usedIn A¹-homotopy theory
Morel–Voevodsky A¹-homotopy theory
Voevodsky’s construction of triangulated categories of motives
algebraic K-theory
algebraic geometry
descent theory
motivic homotopy theory
usedToDefine Nisnevich cohomology
linked to: Nisnevich topology

Nisnevich descent
linked to: Nisnevich topology

Nisnevich sheaves
linked to: Nisnevich topology

Nisnevich-local model structures on motivic spectra
Nisnevich-local model structures on simplicial presheaves

How these facts were elicited

Referenced by (5)

Full triples — surface form annotated when it differs from this entity's canonical label.

Grothendieck topology generalizes Nisnevich topology
Nisnevich topology usedToDefine Nisnevich sheaves
linked to: Nisnevich topology
Nisnevich topology usedToDefine Nisnevich cohomology
linked to: Nisnevich topology
Nisnevich topology usedToDefine Nisnevich descent
linked to: Nisnevich topology
Nisnevich topology arisesFrom Nisnevich cd-structure
linked to: Nisnevich topology