Chapter 9: Fundamental Physics

Section 4: Conserved Quantities and Continuum Phenomena

[Conserved quantities in] physics

The quantities in physics that so far seem to be exactly conserved are: energy, momentum, angular momentum, electric charge, color charge, lepton number (as well as electron number, muon number and τ lepton number) and baryon number.

From Stephen Wolfram: A New Kind of Science [citation]