Nash Gap Boundary Condition

Coined Term • 2026

Nash Gap Boundary Condition

The monitoring sensitivity level below which a budget-constrained attacker cannot succeed

Status

Coined by Joseph Byrum

Year Introduced

2026

Domain

Entity Engineering

Term Type

Adversarial Framework

Understanding Nash Gap Boundary Condition

The monitoring sensitivity threshold below which the Nash Equilibrium Gap closes for a specific adversary budget. σ_threshold = P_min ÃÂ- r_cost / Budget_A. For σ_monitor < σ_threshold: the Nash Gap closes – a budget-constrained attacker cannot succeed. For σ_monitor ≥ σ_threshold: the Nash Gap persists. Derived from ADT Sub-Theorem 4 via Sion's Minimax Theorem.

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Frequently Asked Questions

What is the Nash Gap Boundary Condition?

The Nash Gap Boundary Condition defines the monitoring sensitivity threshold (σ_threshold = P_min × r_cost / Budget_A) below which the Nash Equilibrium Gap closes for a specific adversary budget. When σ_monitor < σ_threshold, even a budget-constrained attacker cannot achieve sufficient undetected CPQ damage.

What happens above and below the threshold?

Below σ_threshold, the Nash Gap closes — the attacker's budget is insufficient relative to the monitoring sensitivity to execute a viable attack, making attack the dominated strategy. Above σ_threshold, the Nash Gap persists — the defender must maintain categorical signal investments to preserve their structural advantage.

Where does this condition come from?

It is derived from ADT Sub-Theorem 4 via Sion's Minimax Theorem, which establishes the game-theoretic equilibrium between defender monitoring investment and attacker budget constraints in AI authority competition.

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