Operator system
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Given a unital C*-algebra , a *-closed subspace S containing 1 is called an operator system. One can associate to each subspace of a unital C*-algebra an operator system via .
The appropriate morphisms between operator systems are completely positive maps.
By a theorem of Choi and Effros, operator systems can be characterized as *-vector spaces equipped with an Archimedean matrix order.
See also
References
- ↑ Choi M.D., Effros, E.G. Injectivity and operator spaces. Journal of Functional Analysis 1977
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