Description:
<jats:p>The graph scheme developed in <jats:sup>1</jats:sup> is further investigated. The structure of the coefficients α<jats:sub>k</jats:sub> is determined in terms of α<jats:sub>0</jats:sub> and the projections of the splitting graphs. This allows a formal summation of the k-series. The first few terms of the strong coupling series for the lowest mass eigenvalue are computed for the λ φ<jats:sup>4</jats:sup> theory. The leading term for large λ is complex. This restricts physically acceptable solutions to λ below some critical value.</jats:p>
<jats:p>By including a bare mass m in the Lagrangian. the α<jats:sub>k</jats:sub> become dependent on it. Consideration of one α<jats:sub>k</jats:sub> e. g. α<jats:sub>0</jats:sub> (m, λ) should then be sufficient for the determination of physical mass eigenvalues.</jats:p>