Extreme rays in $3 \otimes 3$ entangled edge states with positive partial transposes
by Seung-Hyeok Kye
Commun. Korean Math. Soc., 23 (2008), 541-548.
For a completely bounded linear maps between operator spaces, we introduce numbers which measure the degree of injectivity and surjectivity. The number measuring the injectivity is an operator space analougue of the minimum modulus of a linear map in normed spaces.