87932f1c56
The following are accepted .(t) ._ We don't accept .t anymore because it will conflict with the field access notation.
7 lines
244 B
Text
7 lines
244 B
Text
open nat
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attribute [pattern] lt.base
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attribute [pattern] lt.step
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theorem lt_succ {a : nat} : ∀ {b : nat}, a < b → succ a < succ b
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| .(succ a) (lt.base .(a)) := lt.base (succ a)
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| .(succ b) (@lt.step .(a) b h) := lt.step (lt_succ h)
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