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Fix typos in how_to_contradiction.v #134

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Fix typos in how_to_contradiction.v #134

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4 changes: 2 additions & 2 deletions src/metaprogramming/ltac2/how_to_contradiction.v
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Original file line number Diff line number Diff line change
Expand Up @@ -96,7 +96,7 @@ From Ltac2 Require Import Ltac2 Constr Printf.
inconsistent context. It is not meant to be linked with other tactics.
Consequently, we have no use for [multimatch!] to implement [contradiction].
Choosing between [lazy_match!] and [match!] really depends on whether we need
more than a syntactic checkr, as we will see in the rest of this document.
more than a syntactic checker, as we will see in the rest of this document.
*)


Expand Down Expand Up @@ -159,7 +159,7 @@ Abort.
destruct ($np $p)
]]

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.

@amblafont amblafont Aug 14, 2026

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what is this notation ?

@thomas-lamiaux thomas-lamiaux Aug 14, 2026

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@SkySkimmer do you know, I don't remember

@SkySkimmer SkySkimmer Aug 14, 2026

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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))))

@SkySkimmer SkySkimmer Aug 14, 2026

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although that has existed for much longer than 9.1 so maybe not

@SkySkimmer SkySkimmer Aug 14, 2026 •
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Looking at the changelog for 9.1, probably rocq-prover/rocq#20656 $hyp:x


This leads us to the following script:
*)
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