input m,n,c-squared (999 to end)
     mu(m,n)
    18.524508
 input m,n,c-squared (999 to end)
     mu(m,n)
    17.473288
 input m,n,c-squared (999 to end)
     mu(m,n)
    18.000004
 input m,n,c-squared (999 to end)