Logiweb bibliography of peano commutativity

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[0] peano commutativity

[1] base

[2] peano

[3] check

The pyk compiler, version 0.grue.20050603 by Klaus Grue GRD-2005-07-01.UTC:14:58:50.491530 = MJD-53552.TAI:14:59:22.491530 = LGT-4626946762491530e-6