   = \mathop {\int { \cdots \int {} } }\limits_{{\bf y}\, \in \,U(n,\,c)} dy_{\,0}  \cdots dy_{\,n}  =   \cr    &  = \int_{t = 0}^{\;c} {\left( {\mathop {\int { \cdots \int {} } }\limits_{{\bf x}\, \in \,T(n - 0,\,t)} dy_{\,0}  \cdots dy_{\,n - 0} } \right){{dt} \over {\sqrt n }}}  =   \cr    &  = 