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Structures · Topology

SSet.Quasicategory

A simplicial set S is a quasicategory if it satisfies the following horn-filling condition: for every n : ℕ and 0 < i < n, every map of simplicial sets σ₀ : Λ[n, i] → S can be extended to a map σ : Δ[n] → S.

Defined in
Mathlib.AlgebraicTopology.Quasicategory.Basic
Shape
One type argument · adds hornFilling'

Extends0

Extends nothing: this is a root of the hierarchy.

Extended by1

Forgetful instances

Provided automatically by

Concrete types that are instances2

  • CategoryTheory.Functor.obj
  • CategoryTheory.nerve

How is a type an instance?

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Assumed by9

Ancestors0

No ancestors.