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koizel
personoj
Commits
708a4d82
Commit
708a4d82
authored
5 years ago
by
gabrielhdt
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ok with let encoding
parent
ad9a7004
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sandbox/cert_f/rat.lp
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708a4d82
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@@ -11,13 +11,13 @@ symbol frac : Term nat ⇒ Term N.nznat ⇒ Term rat
symbol times : @Term Type rat ⇒ @Term Type rat ⇒ @Term Type rat
rule times (frac &a &b) (frac &c &d) →
let bv ≔ fst N.not_zero &b in
let dv ≔ fst N.not_zero &d in
frac
(N.times &a &c)
(N.nznatc
(N.times (fst N.not_zero &b) (fst N.not_zero &d))
(N.prod_not_zero
(fst N.not_zero &b)
(fst N.not_zero &d)
(N.times bv dv)
(N.prod_not_zero bv dv
(snd N.not_zero &b)
(snd N.not_zero &d)))
...
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@@ -30,7 +30,4 @@ definition onz : Term N.nznat ≔ N.nznatc 1 N.one_not_zero
theorem right_cancellation (a: Term nat) (b: Term N.nznat):
Term (rateq (times (frac a b) (frac (fst N.not_zero b) onz)) (frac a onz))
proof
assume a b
simpl
refine N.prod_comm a b
qed
admit
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