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| Mirrors > Home > MPE Home > Th. List > pmtr3ncomlem2 | Structured version Visualization version GIF version | ||
| Description: Lemma 2 for pmtr3ncom 19602. (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 19600 | . 2 ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑍 ∈ 𝐷) ∧ (𝑋 ≠ 𝑌 ∧ 𝑋 ≠ 𝑍 ∧ 𝑌 ≠ 𝑍)) → ((𝐺 ∘ 𝐹)‘𝑋) ≠ ((𝐹 ∘ 𝐺)‘𝑋)) |
| 5 | fveq1 6877 | . . 3 ⊢ ((𝐺 ∘ 𝐹) = (𝐹 ∘ 𝐺) → ((𝐺 ∘ 𝐹)‘𝑋) = ((𝐹 ∘ 𝐺)‘𝑋)) | |
| 6 | 5 | necon3i 2987 | . 2 ⊢ (((𝐺 ∘ 𝐹)‘𝑋) ≠ ((𝐹 ∘ 𝐺)‘𝑋) → (𝐺 ∘ 𝐹) ≠ (𝐹 ∘ 𝐺)) |
| 7 | 4, 6 | syl 18 | 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 |
| This proof depends on syntax axioms: → wi 4 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 ≠ wne 2955 {cpr 4586 ∘ ccom 5659 ‘cfv 6533 pmTrspcpmtr 19568 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-om 7863 df-1o 8455 df-2o 8456 df-en 8953 df-pmtr 19569 |
| This theorem is used by: pmtr3ncom 19602 |
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