theorem instCoeFiatLineContinuantFiatBoundary._proof_1
theorem instCoeFiatLineContinuantFiatBoundary._proof_1: ∀ (v : qszr71sj.FiatLine), qszr71sj.ContinuantFiatBoundary.Is (Subtype.val v)
theorem instCoeFiatLineContinuantFiatBoundary._proof_1
theorem instCoeFiatLineContinuantFiatBoundary._proof_1: ∀ (v : qszr71sj.FiatLine), qszr71sj.ContinuantFiatBoundary.Is (Subtype.val v)