TR13-149 Authors: Albert Atserias, Neil Thapen

Publication: 1st November 2013 15:49

Downloads: 1678

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The ordering principle states that every finite linear order has a least element. We show that, in the relativized setting, the surjective weak pigeonhole principle for polynomial time functions does not prove a Herbrandized version of the ordering principle over $\mathrm{T}^1_2$. This answers an open question raised in [Buss, Ko{\l}odziejczyk and Thapen, 2012] and completes their program to compare the strength of Je\v{r}\'abek's bounded arithmetic theory for approximate counting with weakened versions of it.