Constraint preserves structure by bounding what holds.
$$ \frac{24}{25} < 1 $$
A bounded ratio is not collapse. Constraint distinguishes limit from failure.
Invariant
$$ \frac{24}{25} \neq \pm 1(9424\pi) \neq -1 $$
Invariant structure preserves relation across change. A valid system stays readable under constraint.
Why Constraint Matters
Accurate listing gives order. Bilateral structure gives correspondence. Constraint gives stability.
Order + correspondence + constraint = invariant structure
Where constraints are ignored, domination replaces relation and error replaces structure.
D → Diagonal
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