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We investigate the nature of power corrections and infrared renormalonsingularities in large $\beta_0$ approximation. We argue that the powercorrection associated with a renormalon pole singularity should appear at O(1),in contrast to the renormalon ambiguity appearing at $O(1/\beta_0)$, and givean explanation why the leading order renormalon singularities are genericallypoles.Comment: 6 page

THE NATURE OF POWER CORRECTIONS IN LARGE-β0 APPROXIMATION

THE NATURE OF POWER CORRECTIONS IN LARGE-β₀ APPROXIMATION