Pauli letter collection: letter to Wolfgang Pauli

Heisenberg replies to Pauli's letter. He is now satisfied with the state of the theory of holes. There are two problems. The first is what kind of Schrödinger equation characterizes the theory of holes and what are at any moment the expectation values for current and charge-density. The second problem is what are the expectation values for the energy-density. He discusses the solutions for both problems. If Pauli agrees, he would like to publish the theory of holes in the present form. He is grateful for Pauli's criticism of his attempts to solve the self-energy question.