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| author | Hannes Schulze <haschu0103@outlook.de> | 2025-11-20 11:56:18 +0100 |
|---|---|---|
| committer | Hannes Schulze <haschu0103@outlook.de> | 2025-11-20 11:56:18 +0100 |
| commit | ea38ef0cb2c57e10696c7fb6108732a6f454818c (patch) | |
| tree | 512b528ce86c39fb29d66441af10b98d3318afe2 /Nominal/Permutations.lean | |
| parent | 80b248c5be656dd2b3ba753871aeeb7102e92ff8 (diff) | |
wip terms
Diffstat (limited to 'Nominal/Permutations.lean')
| -rw-r--r-- | Nominal/Permutations.lean | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Nominal/Permutations.lean b/Nominal/Permutations.lean index bc775b9..79a5042 100644 --- a/Nominal/Permutations.lean +++ b/Nominal/Permutations.lean @@ -138,6 +138,11 @@ lemma swap_mul_self {a b : X} : ⸨a, b⸩ * ⸨a, b⸩ = 1 := by apply ext simp [swap] +/-- Lifting of Equiv.swap_self to finite permutations.-/ +lemma swap_self {a : X} : ⸨a, a⸩ = 1 := by + ext + simp [swap] + /-- Lifting of Equiv.swap_comm to finite permutations. -/ lemma swap_comm {a b : X} : ⸨a, b⸩ = ⸨b, a⸩ := by apply ext |