Symmetry, Invariance & Conservation

Primes about foundational physical principles built on invariance under transformation: gauge symmetry, Noether's link between symmetries and conserved quantities, stationary action, the correspondence constraint between theories, and the entropic arrow of the second law.

5 primes in this family — primes that sit near one another in abstraction space (k-means over structural-signature embeddings). Each is shown with its structural–framed character and how distinctive (sparsely-neighbored) it is.

• Correspondence Principle — structural · distinctive
• Gauge Invariance / Gauge Symmetry — structural · distinctive
• Noether's Theorem — structural · distinctive
• Principle of Least Action — structural · distinctive
• Second Law of Thermodynamics — structural · distinctive