20 lines
324 B
Text
20 lines
324 B
Text
import data.nat.basic
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using nat
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set_option pp.coercion true
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namespace foo
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theorem trans {a b c : nat} (H1 : a = b) (H2 : b = c) : a = c :=
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trans H1 H2
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end
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using foo
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theorem tst (a b : nat) (H0 : b = a) (H : b = 0) : a = 0
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:= have H1 : a = b, from symm H0,
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trans H1 H
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definition f (a b : nat) :=
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let x := 3 in
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a + x
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