OAI/Combinatorics/Ramsey/CycleClique/Construction/Definitions.lean
9 declarations, 0 contain sorry, 0 declared as axioms
Exact cycle–clique Ramsey statements
The red edges are the edges of G; a blue clique is an independent set
in G. The cycle is a non-induced copy on exactly m distinct vertices.
For the main theorem all cycle lengths are at least three.
- def
OAI.CycleClique.Construction.cycleNextline 19Source documentation
Cyclic successor, defined also for the empty index type.
def cycleNext {m : ℕ} (i : Fin m) : Fin m := … - def
OAI.CycleClique.Construction.HasCycleline 23Source documentation
An injectively labelled cycle, including its closing edge.
def HasCycle (G : SimpleGraph V) (m : ℕ) : Prop := …
- def
OAI.CycleClique.Construction.HasIndependentline 27Source documentation
An independent set of exactly
nvertices.def HasIndependent (G : SimpleGraph V) (n : ℕ) : Prop := …
- def
OAI.CycleClique.Construction.RamseyPropertyline 31Source documentation
The red-cycle/blue-clique property at order
N.def RamseyProperty (m n N : ℕ) : Prop := …
- def
OAI.CycleClique.Construction.IsRamseyNumberline 35Source documentation
Specifying the least forcing order avoids an existence convention for
sInf.def IsRamseyNumber (m n N : ℕ) : Prop := …
- theorem
OAI.CycleClique.Construction.HasCycle.mapline 38 - theorem
OAI.CycleClique.Construction.HasIndependent.mapline 44 - theorem
OAI.CycleClique.Construction.HasIndependent.card_leline 50 - theorem
OAI.CycleClique.Construction.HasCycle.card_leline 55