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| Mirrors > Home > MPE Home > Th. List > Mathboxes > pmtrprfv2 | Structured version Visualization version GIF version | ||
| Description: In a transposition of two given points, each maps to the other. (Contributed by Thierry Arnoux, 22-Aug-2020.) |
| Ref | Expression |
|---|---|
| pmtrprfv2.t | ⊢ 𝑇 = (pmTrsp‘𝐷) |
| Ref | Expression |
|---|---|
| pmtrprfv2 | ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑋 ≠ 𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑌) = 𝑋) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | prcom 4690 | . . . 4 ⊢ {𝑌, 𝑋} = {𝑋, 𝑌} | |
| 2 | 1 | fveq2i 6866 | . . 3 ⊢ (𝑇‘{𝑌, 𝑋}) = (𝑇‘{𝑋, 𝑌}) |
| 3 | 2 | fveq1i 6864 | . 2 ⊢ ((𝑇‘{𝑌, 𝑋})‘𝑌) = ((𝑇‘{𝑋, 𝑌})‘𝑌) |
| 4 | ancom 464 | . . . . 5 ⊢ ((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷) ↔ (𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷)) | |
| 5 | necom 3009 | . . . . 5 ⊢ (𝑋 ≠ 𝑌 ↔ 𝑌 ≠ 𝑋) | |
| 6 | 4, 5 | anbi12i 637 | . . . 4 ⊢ (((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷) ∧ 𝑋 ≠ 𝑌) ↔ ((𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷) ∧ 𝑌 ≠ 𝑋)) |
| 7 | df-3an 1099 | . . . 4 ⊢ ((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑋 ≠ 𝑌) ↔ ((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷) ∧ 𝑋 ≠ 𝑌)) | |
| 8 | df-3an 1099 | . . . 4 ⊢ ((𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷 ∧ 𝑌 ≠ 𝑋) ↔ ((𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷) ∧ 𝑌 ≠ 𝑋)) | |
| 9 | 6, 7, 8 | 3bitr4i 305 | . . 3 ⊢ ((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑋 ≠ 𝑌) ↔ (𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷 ∧ 𝑌 ≠ 𝑋)) |
| 10 | pmtrprfv2.t | . . . 4 ⊢ 𝑇 = (pmTrsp‘𝐷) | |
| 11 | 10 | pmtrprfv 19476 | . . 3 ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷 ∧ 𝑌 ≠ 𝑋)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋) |
| 12 | 9, 11 | sylan2b 603 | . 2 ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑋 ≠ 𝑌)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋) |
| 13 | 3, 12 | eqtr3id 2810 | 1 ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑋 ≠ 𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑌) = 𝑋) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 ∧ w3a 1097 = wceq 1559 ∈ wcel 2141 ≠ wne 2956 {cpr 4583 ‘cfv 6517 pmTrspcpmtr 19464 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5226 ax-sep 5245 ax-nul 5255 ax-pow 5321 ax-pr 5389 ax-un 7714 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-id 5540 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-suc 6348 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-1o 8432 df-2o 8433 df-en 8924 df-pmtr 19465 |
| This theorem is referenced by: pmtrcnel 33230 fzo0pmtrlast 33233 pmtridfv2 33237 psgnfzto1stlem 33241 |
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