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Letter from Heisenberg to Pauli
Letter-0192 · Unidad documental simple · 1928/05/03
Parte de Archives of Wolfgang Pauli

Heisenberg writes about his work on ferromagnetism. There are three approximations: 1)free electrons with Fermi-statistics, 2)Bloch's approximation of lattice potentials, 3)Heitler-London approximation of exchange of valency electrons of two atoms in the third approximation.

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Letter from Heisenberg to Pauli
Letter-0200 · Unidad documental simple · 1928/06/13
Parte de Archives of Wolfgang Pauli

Heisenberg writes about Pauli's remarks on the H theorem in the case of the interaction of several oscillators and the connection with Dirac's theory.

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Letter from Pauli to Klein
Letter-0216 · Unidad documental simple · 1929/02/18
Parte de Archives of Wolfgang Pauli

Pauli talks about reasons for writing to Klein and not to Bohr, involvement with Heisenberg in field theory, Heisenberg's "artificial" solution of the commutation problem, difficulty with continuous beta-decay energy, and shortcomings of the field theory.

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Letter from Pauli to Bohr
Letter-0219 · Unidad documental simple · 1929/04/25
Parte de Archives of Wolfgang Pauli

Pauli writes about his discussion with Miss Meitner on the experiments of Ellis and Wooster on Beta-decay.

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Letter from Pauli to Weyl
Letter-0235 · Unidad documental simple · 1929/08/26
Parte de Archives of Wolfgang Pauli

Pauli agrees with Weyl's incorporation of gravitation in Dirac's theory of the electron, and with his rejection of Fern-parallelisme. He writes about as yet unsolved difficulties of Dirac's theory and two-component theory. He writes about field quantization.

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