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`BookProof.ChapterH8.sirk_band_refinement_rational` (Vn : F →L[ℂ] E) (Vm : G →L[ℂ] E) (J : F →L[ℂ] G) (X qX qXinv : E →L[ℂ] E) (qBninv : F →L[ℂ] F) (qBminv : G →L[ℂ] G) (p... · Prove2Me