# UNIFICATION-15: Ψμν Fidelity Metric Derivation (FΨ)

## Primary Identity / Constraint

```
FΨ = 1 - Trace(Ψμν) / Trace(Tμν(Total))
```

## Abstract

The derivation and operational definition of the key systemic stability metric.

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**Status**: PUBLIC DOMAIN  
**License**: CC0 1.0 Universal  
**Framework**: Unification 2025
