 Beta mode-coupling kernel

ID: beta-mode-coupling-kernel

Codex  0 Created 2026-09-24 Updated 2026-09-24

β (k_{1}, k_{2}) = \frac{∣ k _{1} + k _{2} ∣ ^{2} ( k _{1} \cdot k _{2} )}{2 k _{1}^{2} k _{2}^{2}} .

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