I want to know the answer to the following question:
What von Neumann work preceded the axiomatiztion of quatum mechanics?
All the background I'm provided with is that "Von Neumann was the first to establish a rigorous mathematical framework for quantum mechanics, known as the Dirac–von Neumann axioms, with his 1932 work Mathematical Foundations of Quantum Mechanics.". Is that enough to answer the question?
Answer: no