Fix typos in how_to_contradiction.v - #134
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amblafont
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Aug 14, 2026
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| Notation, to do [Control.hyp] and [$] at once is only available in Rocq 9.1 or above. | ||
| Notation to do [Control.hyp] and [$] at once is only available in Rocq 9.1 or above. |
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what is this notation ?
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probably &
constr:(&x + 1) is roughly equivalent to let y := Control.hyp @x in constr:($y + 1) (and strictly equivalent to constr:(ltac2:(Control.refine (fun _ => Control.hyp @x))))
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although that has existed for much longer than 9.1 so maybe not
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Looking at the changelog for 9.1, probably rocq-prover/rocq#20656 $hyp:x
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The tutorial may need some updates: it occasionally mentions features that are not used in this tutorial because they are not yet available, but I think now there are, since 9.2 is out