Le cocycle du verger
Bacher, Roland
Original · EN
We define and prove uniqueness of a natural homomorphism (called the Orchard morphism) from some groups associated naturally to a finite set E to the group E(E) of two-partitions of E representing equivalence relations having at most two classes on E. As an application, given a finite generic configuration C⊂ Rᵈ, we exhibit a natural partition of C in two sets.
English translation
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