On the real unit interval, the notion of a Girard monoid coincides with the
notion of a t-norm-based residuated lattice with strong induced negation.
A geometrical approach toward these Girard monoids, based on the notion of
rotation invariance, is turned in an adequate axiomatization for the involu
tive monoidal t-norm-based residuated logic. (C) 2001 Elsevier Science B.V.
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