+73a often denotes a [Threshold](/wiki/Threshold) or a unique state within a complex system. It represents the precise point where a qualitative change occurs, distinguishing one phase from another. This designation is crucial for understanding [Transition](/wiki/Transition) dynamics.
+## See also
+- [Phase Change](/wiki/Phase_Change)
+- [Critical Point](/wiki/Critical_Point)
+- [System State](/wiki/System_State)
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