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16 lines
275 B
Plaintext
16 lines
275 B
Plaintext
Nat.lemma.bft
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: ∀(n: Nat) (Equal Nat (Nat.half (Nat.double n)) n)
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= λn
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(~n
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λx (Equal Nat (Nat.half (Nat.double x)) x)
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λn
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(Equal.apply
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Nat
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Nat
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Nat.succ
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(Nat.half (Nat.double n))
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n
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(Nat.lemma.bft n)
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)
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λP λa a
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) |