What is Quantum Mechanics? A Minimal Formulation

@article{Friedberg2017WhatIQ,
  title={What is Quantum Mechanics? A Minimal Formulation},
  author={Richard Friedberg and Pierre Hohenberg},
  journal={Foundations of Physics},
  year={2017},
  volume={48},
  pages={295-332}
}
This paper presents a minimal formulation of nonrelativistic quantum mechanics, by which is meant a formulation which describes the theory in a succinct, self-contained, clear, unambiguous and of course correct manner. The bulk of the presentation is the so-called “microscopic theory”, applicable to any closed system S of arbitrary size N, using concepts referring to S alone, without resort to external apparatus or external agents. An example of a similar minimal microscopic theory is the… 

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