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Journal Articles Theoretical Computer Science Year : 1998

Ordinal recursive bounds for Higman's theorem

Elias Tahhan-Bittar
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Abstract

This paper concerns Higman's theorem for stringsgenerated over a finite alphabet. We give a constructiveproof of this theorem and we construct and characterisefunctions which bound the lengths of bad sequences. These bounding functions are described by ordinal-recursive definitions and their characterisation is achievedwith reference to Hardy hierarchies of number-theoretic functions.

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Other [cs.OH]

Dates and versions

inria-00098439 , version 1 (25-09-2006)

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Adam Cichon, Elias Tahhan-Bittar. Ordinal recursive bounds for Higman's theorem. Theoretical Computer Science, 1998, 201 (1-2), pp.63-84. ⟨10.1016/S0304-3975(97)00009-1⟩. ⟨inria-00098439⟩
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