Geodesic
On subgroups of the Lambek pregroup
Theory and applications of categories, Tome 12 (2004), pp. 262-269.

Voir la notice de l'article provenant de la source Theory and Applications of Categories website

A pregroup is a partially ordered monoid in which every element has a left and a right adjoint. The main result is that for some well-behaved subgroups of the group of diffeomorphisms of the real numbers, the set of all endofunctions of the integers that are asymptotic at $\pm\infty$ to (the restriction to the integers of) a function in the subgroup is a pregroup.
Classification : 91F20, 18B35
Keywords: subpregroups of the Lambek pregroup 
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     author = {Michael Barr},
     title = {On subgroups of the {Lambek} pregroup},
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     pages = {262--269},
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     volume = {12},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2004_12_a7/}
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Michael Barr. On subgroups of the Lambek pregroup. Theory and applications of categories, Tome 12 (2004), pp. 262-269. http://geodesic.mathdoc.fr/item/TAC_2004_12_a7/