`BookProof.QgOuterFockFL.qgOuterFriedN_surj` (f : qgOuterFock) : ∃ x : qgOuterFriedDom, qgOuterFriedN x + (x : qgOuterFock) = f

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`BookProof.QgOuterFockFL.qgOuterFriedN_surj` (f : qgOuterFock) : ∃ x : qgOuterFriedDom, qgOuterFriedN x + (x : qgOuterFock) = f · Prove2Me