Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > vtxdginducedm1lem4 | Structured version Visualization version GIF version |
Description: Lemma 4 for vtxdginducedm1 26439. (Contributed by AV, 17-Dec-2021.) |
Ref | Expression |
---|---|
vtxdginducedm1.v | ⊢ 𝑉 = (Vtx‘𝐺) |
vtxdginducedm1.e | ⊢ 𝐸 = (iEdg‘𝐺) |
vtxdginducedm1.k | ⊢ 𝐾 = (𝑉 ∖ {𝑁}) |
vtxdginducedm1.i | ⊢ 𝐼 = {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∉ (𝐸‘𝑖)} |
vtxdginducedm1.p | ⊢ 𝑃 = (𝐸 ↾ 𝐼) |
vtxdginducedm1.s | ⊢ 𝑆 = 〈𝐾, 𝑃〉 |
vtxdginducedm1.j | ⊢ 𝐽 = {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∈ (𝐸‘𝑖)} |
Ref | Expression |
---|---|
vtxdginducedm1lem4 | ⊢ (𝑊 ∈ (𝑉 ∖ {𝑁}) → (#‘{𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}}) = 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2 6191 | . . . . . . . 8 ⊢ (𝑖 = 𝑘 → (𝐸‘𝑖) = (𝐸‘𝑘)) | |
2 | 1 | eleq2d 2687 | . . . . . . 7 ⊢ (𝑖 = 𝑘 → (𝑁 ∈ (𝐸‘𝑖) ↔ 𝑁 ∈ (𝐸‘𝑘))) |
3 | vtxdginducedm1.j | . . . . . . 7 ⊢ 𝐽 = {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∈ (𝐸‘𝑖)} | |
4 | 2, 3 | elrab2 3366 | . . . . . 6 ⊢ (𝑘 ∈ 𝐽 ↔ (𝑘 ∈ dom 𝐸 ∧ 𝑁 ∈ (𝐸‘𝑘))) |
5 | eldifsn 4317 | . . . . . . . 8 ⊢ (𝑊 ∈ (𝑉 ∖ {𝑁}) ↔ (𝑊 ∈ 𝑉 ∧ 𝑊 ≠ 𝑁)) | |
6 | df-ne 2795 | . . . . . . . . 9 ⊢ (𝑊 ≠ 𝑁 ↔ ¬ 𝑊 = 𝑁) | |
7 | eleq2 2690 | . . . . . . . . . . . 12 ⊢ ((𝐸‘𝑘) = {𝑊} → (𝑁 ∈ (𝐸‘𝑘) ↔ 𝑁 ∈ {𝑊})) | |
8 | elsni 4194 | . . . . . . . . . . . . 13 ⊢ (𝑁 ∈ {𝑊} → 𝑁 = 𝑊) | |
9 | 8 | eqcomd 2628 | . . . . . . . . . . . 12 ⊢ (𝑁 ∈ {𝑊} → 𝑊 = 𝑁) |
10 | 7, 9 | syl6bi 243 | . . . . . . . . . . 11 ⊢ ((𝐸‘𝑘) = {𝑊} → (𝑁 ∈ (𝐸‘𝑘) → 𝑊 = 𝑁)) |
11 | 10 | com12 32 | . . . . . . . . . 10 ⊢ (𝑁 ∈ (𝐸‘𝑘) → ((𝐸‘𝑘) = {𝑊} → 𝑊 = 𝑁)) |
12 | 11 | con3rr3 151 | . . . . . . . . 9 ⊢ (¬ 𝑊 = 𝑁 → (𝑁 ∈ (𝐸‘𝑘) → ¬ (𝐸‘𝑘) = {𝑊})) |
13 | 6, 12 | sylbi 207 | . . . . . . . 8 ⊢ (𝑊 ≠ 𝑁 → (𝑁 ∈ (𝐸‘𝑘) → ¬ (𝐸‘𝑘) = {𝑊})) |
14 | 5, 13 | simplbiim 659 | . . . . . . 7 ⊢ (𝑊 ∈ (𝑉 ∖ {𝑁}) → (𝑁 ∈ (𝐸‘𝑘) → ¬ (𝐸‘𝑘) = {𝑊})) |
15 | 14 | com12 32 | . . . . . 6 ⊢ (𝑁 ∈ (𝐸‘𝑘) → (𝑊 ∈ (𝑉 ∖ {𝑁}) → ¬ (𝐸‘𝑘) = {𝑊})) |
16 | 4, 15 | simplbiim 659 | . . . . 5 ⊢ (𝑘 ∈ 𝐽 → (𝑊 ∈ (𝑉 ∖ {𝑁}) → ¬ (𝐸‘𝑘) = {𝑊})) |
17 | 16 | impcom 446 | . . . 4 ⊢ ((𝑊 ∈ (𝑉 ∖ {𝑁}) ∧ 𝑘 ∈ 𝐽) → ¬ (𝐸‘𝑘) = {𝑊}) |
18 | 17 | ralrimiva 2966 | . . 3 ⊢ (𝑊 ∈ (𝑉 ∖ {𝑁}) → ∀𝑘 ∈ 𝐽 ¬ (𝐸‘𝑘) = {𝑊}) |
19 | rabeq0 3957 | . . 3 ⊢ ({𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}} = ∅ ↔ ∀𝑘 ∈ 𝐽 ¬ (𝐸‘𝑘) = {𝑊}) | |
20 | 18, 19 | sylibr 224 | . 2 ⊢ (𝑊 ∈ (𝑉 ∖ {𝑁}) → {𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}} = ∅) |
21 | vtxdginducedm1.e | . . . . . . . 8 ⊢ 𝐸 = (iEdg‘𝐺) | |
22 | 21 | fvexi 6202 | . . . . . . 7 ⊢ 𝐸 ∈ V |
23 | 22 | dmex 7099 | . . . . . 6 ⊢ dom 𝐸 ∈ V |
24 | 23 | rabex 4813 | . . . . 5 ⊢ {𝑖 ∈ dom 𝐸 ∣ 𝑁 ∈ (𝐸‘𝑖)} ∈ V |
25 | 3, 24 | eqeltri 2697 | . . . 4 ⊢ 𝐽 ∈ V |
26 | 25 | rabex 4813 | . . 3 ⊢ {𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}} ∈ V |
27 | hasheq0 13154 | . . 3 ⊢ ({𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}} ∈ V → ((#‘{𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}}) = 0 ↔ {𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}} = ∅)) | |
28 | 26, 27 | ax-mp 5 | . 2 ⊢ ((#‘{𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}}) = 0 ↔ {𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}} = ∅) |
29 | 20, 28 | sylibr 224 | 1 ⊢ (𝑊 ∈ (𝑉 ∖ {𝑁}) → (#‘{𝑘 ∈ 𝐽 ∣ (𝐸‘𝑘) = {𝑊}}) = 0) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 196 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ∉ wnel 2897 ∀wral 2912 {crab 2916 Vcvv 3200 ∖ cdif 3571 ∅c0 3915 {csn 4177 〈cop 4183 dom cdm 5114 ↾ cres 5116 ‘cfv 5888 0cc0 9936 #chash 13117 Vtxcvtx 25874 iEdgciedg 25875 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-1st 7168 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-er 7742 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-card 8765 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-nn 11021 df-n0 11293 df-z 11378 df-uz 11688 df-fz 12327 df-hash 13118 |
This theorem is referenced by: vtxdginducedm1 26439 |
Copyright terms: Public domain | W3C validator |