Addition to the last letter about Heisenberg's calculations.
Zonder titelPauli gives more calculations and questions about Heisenberg's formalism.
Zonder titelHeisenberg makes a tentative reply to Pauli's question about dipole ghosts.
Zonder titelKällén replies to Pauli's last letter. The normal pertubation theory cannot be used in the case mentioned by Pauli.
Zonder titelFierz writes on various papers dealing with the limes photon mass = 0. He adds to this letter some observations on the physical difficulties of quantum electrodynamics.
Zonder titelPauli comments on a letter by Källén and his problem of two N-particles.
Zonder titelPauli gives a more precise formulation to the problem of dipole ghosts and an another solution. He also discusses approximation through complex roots.
Zonder titelPauli writes on a correspondence with Heisenberg on his ideas on field quantization.
Zonder titelPauli replies to Källén's letter of the 10 and the 12 January 1957. He talks about of his discussion with Fierz of the time-dependent solutions for dipole ghosts. Fierz criticizes Pauli's continuity argument for the S-matrix.
Zonder titelPauli writes of his reactions to the experiments showing parity violation. He gives reasons for his doubt of this possibility up to now. The main problem is now: why are the strong interactions reflexion-invariant? Pauli makes some general considerations on TCP-invariance.
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