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Mirrors > Home > MPE Home > Th. List > pmtr3ncomlem2 | Structured version Visualization version GIF version |
Description: Lemma 2 for pmtr3ncom 19083. (Contributed by AV, 17-Mar-2018.) |
Ref | Expression |
---|---|
pmtr3ncom.t | ⊢ 𝑇 = (pmTrsp‘𝐷) |
pmtr3ncom.f | ⊢ 𝐹 = (𝑇‘{𝑋, 𝑌}) |
pmtr3ncom.g | ⊢ 𝐺 = (𝑇‘{𝑌, 𝑍}) |
Ref | Expression |
---|---|
pmtr3ncomlem2 | ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑍 ∈ 𝐷) ∧ (𝑋 ≠ 𝑌 ∧ 𝑋 ≠ 𝑍 ∧ 𝑌 ≠ 𝑍)) → (𝐺 ∘ 𝐹) ≠ (𝐹 ∘ 𝐺)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pmtr3ncom.t | . . 3 ⊢ 𝑇 = (pmTrsp‘𝐷) | |
2 | pmtr3ncom.f | . . 3 ⊢ 𝐹 = (𝑇‘{𝑋, 𝑌}) | |
3 | pmtr3ncom.g | . . 3 ⊢ 𝐺 = (𝑇‘{𝑌, 𝑍}) | |
4 | 1, 2, 3 | pmtr3ncomlem1 19081 | . 2 ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑍 ∈ 𝐷) ∧ (𝑋 ≠ 𝑌 ∧ 𝑋 ≠ 𝑍 ∧ 𝑌 ≠ 𝑍)) → ((𝐺 ∘ 𝐹)‘𝑋) ≠ ((𝐹 ∘ 𝐺)‘𝑋)) |
5 | fveq1 6773 | . . 3 ⊢ ((𝐺 ∘ 𝐹) = (𝐹 ∘ 𝐺) → ((𝐺 ∘ 𝐹)‘𝑋) = ((𝐹 ∘ 𝐺)‘𝑋)) | |
6 | 5 | necon3i 2976 | . 2 ⊢ (((𝐺 ∘ 𝐹)‘𝑋) ≠ ((𝐹 ∘ 𝐺)‘𝑋) → (𝐺 ∘ 𝐹) ≠ (𝐹 ∘ 𝐺)) |
7 | 4, 6 | syl 17 | 1 ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑍 ∈ 𝐷) ∧ (𝑋 ≠ 𝑌 ∧ 𝑋 ≠ 𝑍 ∧ 𝑌 ≠ 𝑍)) → (𝐺 ∘ 𝐹) ≠ (𝐹 ∘ 𝐺)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 {cpr 4563 ∘ ccom 5593 ‘cfv 6433 pmTrspcpmtr 19049 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-om 7713 df-1o 8297 df-2o 8298 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-pmtr 19050 |
This theorem is referenced by: pmtr3ncom 19083 |
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