To (re?)investigate: Noether's theorem

Penrose's distinction between **U** (unitary transforms; deterministic and
linear) and **R** (reductive transforms; in?deterministic and non-linear, due
to squaring of Ψ to calculate probabilities) in QM emperors-new-mind

# Bibliography

emperors-new-mind
Penrose, Roger. 1999. *The Emperor's New Mind: Concerning Computers, Minds, and the Laws of Physics*. Oxford University Press.
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