On the convergence of exponential operators—the Zassenhaus formula, BCH formula and systematic approximants Masuo Suzuki OriginalPaper Pages: 193 - 200
Scalar Quantum Electrodynamics on the lattice as classical statistical mechanics Gian Fabrizio De AngelisDiego de FalcoFrancesco Guerra OriginalPaper Pages: 201 - 212
On the existence of crossing symmetric and unitary scattering amplitudes with Regge poles J. Kupsch OriginalPaper Pages: 219 - 233
Strong coupling in the quantum field theory with nonlocal nonpolynomial interaction G. V. Efimov OriginalPaper Pages: 235 - 258
Correlation inequalities for Ising ferromagnets with symmetries Gerhard C. Hegerfeldt OriginalPaper Pages: 259 - 266