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E0 CITIZEN · CASIMIR JUNCTION
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$\mathcal Q[\mathsf{Total\ Casimir}\mid C:=(J_1+J_2+J_3)^2;\operatorname{End}(\Sigma);C|{V_J}=J(J+1)I{V_J}\land\sigma(C)=\{0,2,6,12,20,30,42\};E0;\varnothing]$
Route: Casimir Junction → Spectral Selector
Evidence: E0 exact
Boundary: Spectrum on $V_2^{\otimes3}$.