Robust Control Toolbox :Relation between H infinity optimal gain and Mu-Analysis

Hello, everyone :)

I am quite confused with the relation between the optimal gain gamma (which could be computed via the funtion hinfsyn)and the M-Block of Mu-Analysis.

For example: the plant involves 3 prametric uncertainties. Firstly I used S/KS methode to generate an augment-plant (with the funcion augw) and than the closed gain could be calculated by the function hinfsyn gamma= 0.65 for instance.

As we know, in Mu-analysis we have to deal with \delta-M block to analyse the robust stability and robust performance. but this gamma=0.65 means which block's infinity-Norm in M-Block??? M11 or M22?? or the whole M-block ???

thank u very much