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Published online by Cambridge University Press: 02 May 2017
We prove a necessary and sufficient condition for embeddability of an operator system into ${\mathcal{O}}_{2}$ . Using Kirchberg’s theorems on a tensor product of
${\mathcal{O}}_{2}$ and
${\mathcal{O}}_{\infty }$ , we establish results on their operator system counterparts
${\mathcal{S}}_{2}$ and
${\mathcal{S}}_{\infty }$ . Applications of the results, including some examples describing
$C^{\ast }$ -envelopes of operator systems, are also discussed.