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Description: A transposition is an odd permutation. (Contributed by SO, 9-Jul-2018)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | evpmodpmf1o.s | ||
| evpmodpmf1o.p | |||
| pmtrodpm.t | |||
| Assertion | pmtrodpm |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | evpmodpmf1o.s | ||
| 2 | evpmodpmf1o.p | ||
| 3 | pmtrodpm.t | ||
| 4 | simpl | ||
| 5 | 3 1 2 | symgtrf | |
| 6 | 5 | sseli | |
| 7 | 6 | adantl | |
| 8 | eqid | ||
| 9 | 1 3 8 | psgnpmtr | |
| 10 | 9 | adantl | |
| 11 | 1 2 8 | psgnodpmr | |
| 12 | 4 7 10 11 | syl3anc |