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Mirrors > Home > MPE Home > Th. List > upgrres1lem1 | Structured version Visualization version GIF version |
Description: Lemma 1 for upgrres1 29345. (Contributed by AV, 7-Nov-2020.) |
Ref | Expression |
---|---|
upgrres1.v | ⊢ 𝑉 = (Vtx‘𝐺) |
upgrres1.e | ⊢ 𝐸 = (Edg‘𝐺) |
upgrres1.f | ⊢ 𝐹 = {𝑒 ∈ 𝐸 ∣ 𝑁 ∉ 𝑒} |
Ref | Expression |
---|---|
upgrres1lem1 | ⊢ ((𝑉 ∖ {𝑁}) ∈ V ∧ ( I ↾ 𝐹) ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | upgrres1.v | . . . 4 ⊢ 𝑉 = (Vtx‘𝐺) | |
2 | 1 | fvexi 6921 | . . 3 ⊢ 𝑉 ∈ V |
3 | 2 | difexi 5336 | . 2 ⊢ (𝑉 ∖ {𝑁}) ∈ V |
4 | upgrres1.f | . . . 4 ⊢ 𝐹 = {𝑒 ∈ 𝐸 ∣ 𝑁 ∉ 𝑒} | |
5 | upgrres1.e | . . . . 5 ⊢ 𝐸 = (Edg‘𝐺) | |
6 | 5 | fvexi 6921 | . . . 4 ⊢ 𝐸 ∈ V |
7 | 4, 6 | rabex2 5347 | . . 3 ⊢ 𝐹 ∈ V |
8 | resiexg 7935 | . . 3 ⊢ (𝐹 ∈ V → ( I ↾ 𝐹) ∈ V) | |
9 | 7, 8 | ax-mp 5 | . 2 ⊢ ( I ↾ 𝐹) ∈ V |
10 | 3, 9 | pm3.2i 470 | 1 ⊢ ((𝑉 ∖ {𝑁}) ∈ V ∧ ( I ↾ 𝐹) ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 395 = wceq 1537 ∈ wcel 2106 ∉ wnel 3044 {crab 3433 Vcvv 3478 ∖ cdif 3960 {csn 4631 I cid 5582 ↾ cres 5691 ‘cfv 6563 Vtxcvtx 29028 Edgcedg 29079 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-sb 2063 df-clab 2713 df-cleq 2727 df-clel 2814 df-ne 2939 df-ral 3060 df-rex 3069 df-rab 3434 df-v 3480 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-br 5149 df-opab 5211 df-id 5583 df-xp 5695 df-rel 5696 df-res 5701 df-iota 6516 df-fv 6571 |
This theorem is referenced by: upgrres1lem2 29343 upgrres1lem3 29344 |
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