Classification of Non-Positive Universal Products and their GNS-Modules
نویسندگان
چکیده
It is known that there are exactly five positive universal products. We classify non-positive universal products and find a two-parameter deformation of the Boolean product, which we call (r, s)-products. Furthermore, we introduce a GNS-construction for non-positive linear functionals on algebras and study the GNS-modules of (r, s)-product functionals.
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