9 lines
338 B
Text
9 lines
338 B
Text
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import macros
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import tactic
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theorem my_proof_irrel {a b : Bool} (H1 : a) (H2 : b) : H1 == H2
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:= let H1b : b := cast (by simp) H1,
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H1_eq_H1b : H1 == H1b := hsymm (cast_heq (by simp) H1),
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H1b_eq_H2 : H1b == H2 := to_heq (proof_irrel H1b H2)
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in htrans H1_eq_H1b H1b_eq_H2
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