9 lines
241 B
Text
9 lines
241 B
Text
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show eq a c, from trans H1 H2 : eq a c
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------------
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have e1 [fact] : eq a b, from H1,
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have e2 : eq a c, from trans e1 H2,
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have e3 : eq c a, from symm e2,
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have e4 [fact] : eq b a, from symm e1,
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show eq b c, from trans (symm e1) e2 :
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eq b c
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