An exhaust-gas turbocharger for an internal combustion engine has a turbine having a variable turbine geometry for the variable setting of the effective flow inlet cross section to the turbine wheel. First and second contact-conductive sections are formed in a region from an interlayer dielectric between the first and second conductive layers to an interlayer dielectric between the second and third conductive layers. An annihilation polynomial is found based upon the level permutation set. The second end can be located spaced apart from and opposite to a second curve section of the spherical article at the other end of the diametrical line.