Kind/book/U60.if.kind2
2024-03-01 20:40:31 -03:00

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U60.if
: ∀(x: #U60) ∀(P: *) ∀(t: P) ∀(f: P) P
= λx λP λt λf #match x = x { #0: t #+: f }: P