###### Mathematics and Quantum Mechanics

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*Erhard Scholz*

## H. Weyl Entering the “New” Quantum Mechanics Discourse

Early in 1925 H. Weyl finished his great series of publications on the representation of Lie groups and started the studies for his "Philosophie der Mathematik und Naturwissenschaften" delivered to the editors in summer 1926. He was in touch with M. Born and got to know of the *More H. Weyl Entering the “New” Quantum Mechanics Discourse*

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*Martina Schneider*

## A Service for the Physicists? Van der Waerden's Early Contributions to Quantum Mechanics

The introduction of group-theoretic methods by Heisenberg, Wigner and Weyl was part of the process of the mathematization of quantum mechanics. These methods were not only highly effective for a mathematical *More A Service for the Physicists? Van der Waerden's Early Contributions to Quantum Mechanics*