Talk:Preintuitionism

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[edit] Induction

We know that topics like finite field arithmetic do not require induction. We feel (intuitively?) that topics like analysis are consistent with induction. Are there any examples of mathematical/logical systems which are "infinite" in some sense, but for which induction does not work? That is, has anyone created a (more-or-less consistent) system in which induction was intentionally broken, on purpose, but the system still somehow acheives a notion of infinity? Should I be asking this question on the Peano's axioms talk page instead? linas 05:40, 7 September 2005 (UTC)