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Mirrors > Home > MPE Home > Th. List > finsumvtxdg2ssteplem1 | Structured version Visualization version GIF version |
Description: Lemma for finsumvtxdg2sstep 27819. (Contributed by AV, 15-Dec-2021.) |
Ref | Expression |
---|---|
finsumvtxdg2sstep.v | ⊢ 𝑉 = (Vtx‘𝐺) |
finsumvtxdg2sstep.e | ⊢ 𝐸 = (iEdg‘𝐺) |
finsumvtxdg2sstep.k | ⊢ 𝐾 = (𝑉 ∖ {𝑁}) |
finsumvtxdg2sstep.i | ⊢ 𝐼 = {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∉ (𝐸‘𝑖)} |
finsumvtxdg2sstep.p | ⊢ 𝑃 = (𝐸 ↾ 𝐼) |
finsumvtxdg2sstep.s | ⊢ 𝑆 = 〈𝐾, 𝑃〉 |
finsumvtxdg2ssteplem.j | ⊢ 𝐽 = {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∈ (𝐸‘𝑖)} |
Ref | Expression |
---|---|
finsumvtxdg2ssteplem1 | ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → (♯‘𝐸) = ((♯‘𝑃) + (♯‘𝐽))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | upgruhgr 27375 | . . . . 5 ⊢ (𝐺 ∈ UPGraph → 𝐺 ∈ UHGraph) | |
2 | finsumvtxdg2sstep.e | . . . . . 6 ⊢ 𝐸 = (iEdg‘𝐺) | |
3 | 2 | uhgrfun 27339 | . . . . 5 ⊢ (𝐺 ∈ UHGraph → Fun 𝐸) |
4 | 1, 3 | syl 17 | . . . 4 ⊢ (𝐺 ∈ UPGraph → Fun 𝐸) |
5 | 4 | ad2antrr 722 | . . 3 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → Fun 𝐸) |
6 | simprr 769 | . . 3 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → 𝐸 ∈ Fin) | |
7 | finsumvtxdg2sstep.i | . . . . 5 ⊢ 𝐼 = {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∉ (𝐸‘𝑖)} | |
8 | 7 | ssrab3 4011 | . . . 4 ⊢ 𝐼 ⊆ dom 𝐸 |
9 | 8 | a1i 11 | . . 3 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → 𝐼 ⊆ dom 𝐸) |
10 | hashreshashfun 14082 | . . 3 ⊢ ((Fun 𝐸 ∧ 𝐸 ∈ Fin ∧ 𝐼 ⊆ dom 𝐸) → (♯‘𝐸) = ((♯‘(𝐸 ↾ 𝐼)) + (♯‘(dom 𝐸 ∖ 𝐼)))) | |
11 | 5, 6, 9, 10 | syl3anc 1369 | . 2 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → (♯‘𝐸) = ((♯‘(𝐸 ↾ 𝐼)) + (♯‘(dom 𝐸 ∖ 𝐼)))) |
12 | finsumvtxdg2sstep.p | . . . . . 6 ⊢ 𝑃 = (𝐸 ↾ 𝐼) | |
13 | 12 | eqcomi 2747 | . . . . 5 ⊢ (𝐸 ↾ 𝐼) = 𝑃 |
14 | 13 | fveq2i 6759 | . . . 4 ⊢ (♯‘(𝐸 ↾ 𝐼)) = (♯‘𝑃) |
15 | 14 | a1i 11 | . . 3 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → (♯‘(𝐸 ↾ 𝐼)) = (♯‘𝑃)) |
16 | notrab 4242 | . . . . . 6 ⊢ (dom 𝐸 ∖ {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∉ (𝐸‘𝑖)}) = {𝑖 ∈ dom 𝐸 ∣ ¬ 𝑁 ∉ (𝐸‘𝑖)} | |
17 | 7 | difeq2i 4050 | . . . . . 6 ⊢ (dom 𝐸 ∖ 𝐼) = (dom 𝐸 ∖ {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∉ (𝐸‘𝑖)}) |
18 | finsumvtxdg2ssteplem.j | . . . . . . 7 ⊢ 𝐽 = {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∈ (𝐸‘𝑖)} | |
19 | nnel 3057 | . . . . . . . . 9 ⊢ (¬ 𝑁 ∉ (𝐸‘𝑖) ↔ 𝑁 ∈ (𝐸‘𝑖)) | |
20 | 19 | bicomi 223 | . . . . . . . 8 ⊢ (𝑁 ∈ (𝐸‘𝑖) ↔ ¬ 𝑁 ∉ (𝐸‘𝑖)) |
21 | 20 | rabbii 3397 | . . . . . . 7 ⊢ {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∈ (𝐸‘𝑖)} = {𝑖 ∈ dom 𝐸 ∣ ¬ 𝑁 ∉ (𝐸‘𝑖)} |
22 | 18, 21 | eqtri 2766 | . . . . . 6 ⊢ 𝐽 = {𝑖 ∈ dom 𝐸 ∣ ¬ 𝑁 ∉ (𝐸‘𝑖)} |
23 | 16, 17, 22 | 3eqtr4i 2776 | . . . . 5 ⊢ (dom 𝐸 ∖ 𝐼) = 𝐽 |
24 | 23 | a1i 11 | . . . 4 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → (dom 𝐸 ∖ 𝐼) = 𝐽) |
25 | 24 | fveq2d 6760 | . . 3 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → (♯‘(dom 𝐸 ∖ 𝐼)) = (♯‘𝐽)) |
26 | 15, 25 | oveq12d 7273 | . 2 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → ((♯‘(𝐸 ↾ 𝐼)) + (♯‘(dom 𝐸 ∖ 𝐼))) = ((♯‘𝑃) + (♯‘𝐽))) |
27 | 11, 26 | eqtrd 2778 | 1 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ (𝑉 ∈ Fin ∧ 𝐸 ∈ Fin)) → (♯‘𝐸) = ((♯‘𝑃) + (♯‘𝐽))) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ∉ wnel 3048 {crab 3067 ∖ cdif 3880 ⊆ wss 3883 {csn 4558 〈cop 4564 dom cdm 5580 ↾ cres 5582 Fun wfun 6412 ‘cfv 6418 (class class class)co 7255 Fincfn 8691 + caddc 10805 ♯chash 13972 Vtxcvtx 27269 iEdgciedg 27270 UHGraphcuhgr 27329 UPGraphcupgr 27353 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-oadd 8271 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-dju 9590 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-2 11966 df-n0 12164 df-xnn0 12236 df-z 12250 df-uz 12512 df-fz 13169 df-hash 13973 df-uhgr 27331 df-upgr 27355 |
This theorem is referenced by: finsumvtxdg2sstep 27819 |
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