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Mirrors > Home > MPE Home > Th. List > Mathboxes > uhgrspan1lem1 | Structured version Visualization version GIF version |
Description: Lemma 1 for uhgrspan1 40527. (Contributed by AV, 19-Nov-2020.) |
Ref | Expression |
---|---|
uhgrspan1.v | ⊢ 𝑉 = (Vtx‘𝐺) |
uhgrspan1.i | ⊢ 𝐼 = (iEdg‘𝐺) |
uhgrspan1.f | ⊢ 𝐹 = {𝑖 ∈ dom 𝐼 ∣ 𝑁 ∉ (𝐼‘𝑖)} |
Ref | Expression |
---|---|
uhgrspan1lem1 | ⊢ ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼 ↾ 𝐹) ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uhgrspan1.v | . . . 4 ⊢ 𝑉 = (Vtx‘𝐺) | |
2 | fvex 6113 | . . . 4 ⊢ (Vtx‘𝐺) ∈ V | |
3 | 1, 2 | eqeltri 2684 | . . 3 ⊢ 𝑉 ∈ V |
4 | difexg 4735 | . . 3 ⊢ (𝑉 ∈ V → (𝑉 ∖ {𝑁}) ∈ V) | |
5 | 3, 4 | ax-mp 5 | . 2 ⊢ (𝑉 ∖ {𝑁}) ∈ V |
6 | uhgrspan1.i | . . . 4 ⊢ 𝐼 = (iEdg‘𝐺) | |
7 | fvex 6113 | . . . 4 ⊢ (iEdg‘𝐺) ∈ V | |
8 | 6, 7 | eqeltri 2684 | . . 3 ⊢ 𝐼 ∈ V |
9 | 8 | resex 5363 | . 2 ⊢ (𝐼 ↾ 𝐹) ∈ V |
10 | 5, 9 | pm3.2i 470 | 1 ⊢ ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼 ↾ 𝐹) ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 383 = wceq 1475 ∈ wcel 1977 ∉ wnel 2781 {crab 2900 Vcvv 3173 ∖ cdif 3537 {csn 4125 dom cdm 5038 ↾ cres 5040 ‘cfv 5804 Vtxcvtx 25673 iEdgciedg 25674 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-sn 4126 df-pr 4128 df-uni 4373 df-res 5050 df-iota 5768 df-fv 5812 |
This theorem is referenced by: uhgrspan1lem2 40525 uhgrspan1lem3 40526 |
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