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Free $$\ell$$-groups and free products of $$\ell$$-groups. (English) Zbl 0820.06010
From the author’s summary: We give the construction of free l-groups generated by a po-group and the construction of free products in any sub- product class $$U$$ of l-groups. It is proved that the $$U$$-free products satisfy the weak subalgebra property.
##### MSC:
 06F15 Ordered groups
##### Keywords:
free l-groups; po-group; free products; weak subalgebra property
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