Using mathematical arguments, this view of the conceptual foundations of quantum physics and the fundamental physical implications of quantum formalism deals with non-separability, hidden variable theories and measurement theories.

Editor’s Foreword , 1999 Special Preface , Vita , Pedro’s Debate (Preface to Second Edition) , Preface (To First Edition) , Elements of Quantum Mechanics , Matter Waves , Superposition and Linearity , Statement of the Rules , Comments , Alternative Formulations , Density Matrices and Mixtures , The Density Matrix Formalism , Mixtures , Quantum Nonseparability , The Einstein-Podolsky-Rosen Problem , Possible Views on Nonseparability , Individuals, Ensembles, States , The “Hidden Variables” Approach , Direct Study of Some Principles , Aspects of the Problem of Retrodiction , Measurement Theories , Elements of Measurement Theory , Classical Properties , Macroscopic Instruments , Of Cats and Pointers , Nonideal Measurements: Small Influence of Outside World , Knowledge and the Physical World , Reality and Objects , Positivism , Bohr and Heisenberg , Wigner’s Friend , The Relativity of States , Summary and Outlook , Summary , Outlook