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    - $\large \color{DeepSkyBlue} \gamma^\mu$ are the Dirac matrices.  
    - $\large \color{DeepSkyBlue} m$ is the mass of the particle.  
 
-#
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+<br>
 
+## Mid-20th Century – Foundation for Quantum Information
 
+7. **John von Neumann (1932)**  
+   * Formalized the mathematics of quantum mechanics and introduced operator theory.
 
+