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| Mirrors > Home > MPE Home > Th. List > pmtr3ncomlem2 | Structured version Visualization version GIF version | ||
| Description: Lemma 2 for pmtr3ncom 19698. (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 19696 | . 2 ⊢ ((𝐷 ∈ 𝑉 ∧ (𝑋 ∈ 𝐷 ∧ 𝑌 ∈ 𝐷 ∧ 𝑍 ∈ 𝐷) ∧ (𝑋 ≠ 𝑌 ∧ 𝑋 ≠ 𝑍 ∧ 𝑌 ≠ 𝑍)) → ((𝐺 ∘ 𝐹)‘𝑋) ≠ ((𝐹 ∘ 𝐺)‘𝑋)) |
| 5 | fveq1 6889 | . . 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 1569 ∈ wcel 2144 ≠ wne 2955 {cpr 4586 ∘ ccom 5655 ‘cfv 6543 pmTrspcpmtr 19664 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-om 7882 df-1o 8483 df-2o 8484 df-en 8981 df-pmtr 19665 |
| This theorem is used by: pmtr3ncom 19698 |
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