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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 4699 | . . . 4 ⊢ {𝑌, 𝑋} = {𝑋, 𝑌} | |
| 2 | 1 | fveq2i 6886 | . . 3 ⊢ (𝑇‘{𝑌, 𝑋}) = (𝑇‘{𝑋, 𝑌}) |
| 3 | 2 | fveq1i 6884 | . 2 ⊢ ((𝑇‘{𝑌, 𝑋})‘𝑌) = ((𝑇‘{𝑋, 𝑌})‘𝑌) |
| 4 | ancom 465 | . . . . 5 ⊢ ((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷) ↔ (𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷)) | |
| 5 | necom 3011 | . . . . 5 ⊢ (𝑋 ≠ 𝑌 ↔ 𝑌 ≠ 𝑋) | |
| 6 | 4, 5 | anbi12i 639 | . . . 4 ⊢ (((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷) ∧ 𝑋 ≠ 𝑌) ↔ ((𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷) ∧ 𝑌 ≠ 𝑋)) |
| 7 | df-3an 1105 | . . . 4 ⊢ ((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑋 ≠ 𝑌) ↔ ((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷) ∧ 𝑋 ≠ 𝑌)) | |
| 8 | df-3an 1105 | . . . 4 ⊢ ((𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷 ∧ 𝑌 ≠ 𝑋) ↔ ((𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷) ∧ 𝑌 ≠ 𝑋)) | |
| 9 | 6, 7, 8 | 3bitr4i 306 | . . 3 ⊢ ((𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑋 ≠ 𝑌) ↔ (𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷 ∧ 𝑌 ≠ 𝑋)) |
| 10 | pmtrprfv2.t | . . . 4 ⊢ 𝑇 = (pmTrsp‘𝐷) | |
| 11 | 10 | pmtrprfv 19524 | . . 3 ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑌 ∈ 𝐷 ∧ 𝑋 ∈ 𝐷 ∧ 𝑌 ≠ 𝑋)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋) |
| 12 | 9, 11 | sylan2b 605 | . 2 ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑋 ≠ 𝑌)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋) |
| 13 | 3, 12 | eqtr3id 2812 | 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 400 ∧ w3a 1103 = wceq 1570 ∈ wcel 2143 ≠ wne 2958 {cpr 4592 ‘cfv 6538 pmTrspcpmtr 19512 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5239 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-1o 8454 df-2o 8455 df-en 8945 df-pmtr 19513 |
| This theorem is referenced by: pmtrcnel 33390 fzo0pmtrlast 33393 pmtridfv2 33397 psgnfzto1stlem 33401 |
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