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Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > dfnbgrss2 | Structured version Visualization version GIF version |
Description: Subset chain for different kinds of neighborhoods of a vertex. (Contributed by AV, 16-May-2025.) |
Ref | Expression |
---|---|
dfvopnbgr2.v | ⊢ 𝑉 = (Vtx‘𝐺) |
dfvopnbgr2.e | ⊢ 𝐸 = (Edg‘𝐺) |
dfvopnbgr2.u | ⊢ 𝑈 = {𝑛 ∈ 𝑉 ∣ (𝑛 ∈ (𝐺 NeighbVtx 𝑁) ∨ ∃𝑒 ∈ 𝐸 (𝑁 = 𝑛 ∧ 𝑒 = {𝑁}))} |
dfsclnbgr6.s | ⊢ 𝑆 = {𝑛 ∈ 𝑉 ∣ ∃𝑒 ∈ 𝐸 {𝑁, 𝑛} ⊆ 𝑒} |
Ref | Expression |
---|---|
dfnbgrss2 | ⊢ (𝑁 ∈ 𝑉 → ((𝐺 NeighbVtx 𝑁) ⊆ 𝑈 ∧ 𝑈 ⊆ 𝑆 ∧ 𝑆 ⊆ (𝐺 ClNeighbVtx 𝑁))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfvopnbgr2.v | . . . 4 ⊢ 𝑉 = (Vtx‘𝐺) | |
2 | dfvopnbgr2.e | . . . 4 ⊢ 𝐸 = (Edg‘𝐺) | |
3 | dfvopnbgr2.u | . . . 4 ⊢ 𝑈 = {𝑛 ∈ 𝑉 ∣ (𝑛 ∈ (𝐺 NeighbVtx 𝑁) ∨ ∃𝑒 ∈ 𝐸 (𝑁 = 𝑛 ∧ 𝑒 = {𝑁}))} | |
4 | 1, 2, 3 | dfnbgr6 47781 | . . 3 ⊢ (𝑁 ∈ 𝑉 → (𝐺 NeighbVtx 𝑁) = (𝑈 ∖ {𝑁})) |
5 | difss 4146 | . . 3 ⊢ (𝑈 ∖ {𝑁}) ⊆ 𝑈 | |
6 | 4, 5 | eqsstrdi 4050 | . 2 ⊢ (𝑁 ∈ 𝑉 → (𝐺 NeighbVtx 𝑁) ⊆ 𝑈) |
7 | ssun1 4188 | . . 3 ⊢ 𝑈 ⊆ (𝑈 ∪ {𝑛 ∈ {𝑁} ∣ ∃𝑒 ∈ 𝐸 𝑛 ∈ 𝑒}) | |
8 | dfsclnbgr6.s | . . . 4 ⊢ 𝑆 = {𝑛 ∈ 𝑉 ∣ ∃𝑒 ∈ 𝐸 {𝑁, 𝑛} ⊆ 𝑒} | |
9 | 1, 2, 3, 8 | dfsclnbgr6 47782 | . . 3 ⊢ (𝑁 ∈ 𝑉 → 𝑆 = (𝑈 ∪ {𝑛 ∈ {𝑁} ∣ ∃𝑒 ∈ 𝐸 𝑛 ∈ 𝑒})) |
10 | 7, 9 | sseqtrrid 4049 | . 2 ⊢ (𝑁 ∈ 𝑉 → 𝑈 ⊆ 𝑆) |
11 | 1, 8, 2 | dfnbgrss 47776 | . . 3 ⊢ (𝑁 ∈ 𝑉 → ((𝐺 NeighbVtx 𝑁) ⊆ 𝑆 ∧ 𝑆 ⊆ (𝐺 ClNeighbVtx 𝑁))) |
12 | 11 | simprd 495 | . 2 ⊢ (𝑁 ∈ 𝑉 → 𝑆 ⊆ (𝐺 ClNeighbVtx 𝑁)) |
13 | 6, 10, 12 | 3jca 1127 | 1 ⊢ (𝑁 ∈ 𝑉 → ((𝐺 NeighbVtx 𝑁) ⊆ 𝑈 ∧ 𝑈 ⊆ 𝑆 ∧ 𝑆 ⊆ (𝐺 ClNeighbVtx 𝑁))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∨ wo 847 ∧ w3a 1086 = wceq 1537 ∈ wcel 2106 ∃wrex 3068 {crab 3433 ∖ cdif 3960 ∪ cun 3961 ⊆ wss 3963 {csn 4631 {cpr 4633 ‘cfv 6563 (class class class)co 7431 Vtxcvtx 29028 Edgcedg 29079 NeighbVtx cnbgr 29364 ClNeighbVtx cclnbgr 47743 |
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-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 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-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-ral 3060 df-rex 3069 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 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-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5583 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-iota 6516 df-fun 6565 df-fv 6571 df-ov 7434 df-oprab 7435 df-mpo 7436 df-1st 8013 df-2nd 8014 df-nbgr 29365 df-clnbgr 47744 |
This theorem is referenced by: (None) |
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