Example image of eyePlorer eyePlorer map for 'Grzegorczyk hierarchy': Andrzej Grzegorczyk Computability theory Function (mathematics) Primitive recursive function Closure (mathematics) Function composition Projection (set theory) Hyperoperation ELEMENTARY Tetration Partition of a set Ordinal Transfinite number Fast-growing hierarchy Limit ordinal Martin Löb Ε₀ Van der Waerden number Szemerédi regularity lemma Ordinal analysis
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