cusgrfilem1 - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > cusgrfilem1		Structured version Visualization version GIF version

Theorem cusgrfilem1 29488

Description: Lemma 1 for cusgrfi 29491. (Contributed by Alexander van der Vekens, 13-Jan-2018.) (Revised by AV, 11-Nov-2020.)

**Hypotheses**
Ref	Expression
cusgrfi.v	⊢ 𝑉 = (Vtx‘𝐺)
cusgrfi.p	⊢ 𝑃 = {𝑥 ∈ 𝒫 𝑉 ∣ ∃𝑎 ∈ 𝑉 (𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁})}

**Assertion**
Ref	Expression
cusgrfilem1	⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑃 ⊆ (Edg‘𝐺))

Distinct variable groups: 𝑥,𝐺 𝑁,𝑎,𝑥 𝑉,𝑎,𝑥 Allowed substitution hints: 𝑃(𝑥,𝑎) 𝐺(𝑎)

**Proof of Theorem cusgrfilem1**
Step	Hyp	Ref	Expression
1		cusgrfi.v	. . . 4 ⊢ 𝑉 = (Vtx‘𝐺)
2		eqid 2735	. . . 4 ⊢ (Edg‘𝐺) = (Edg‘𝐺)
3	1, 2	cusgredg 29456	. . 3 ⊢ (𝐺 ∈ ComplUSGraph → (Edg‘𝐺) = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2})
4		fveq2 6907	. . . . . . . . 9 ⊢ (𝑥 = {𝑎, 𝑁} → (♯‘𝑥) = (♯‘{𝑎, 𝑁}))
5	4	ad2antlr 727	. . . . . . . 8 ⊢ (((𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁}) ∧ (𝑎 ∈ 𝑉 ∧ (𝑁 ∈ 𝑉 ∧ 𝑥 ∈ 𝒫 𝑉))) → (♯‘𝑥) = (♯‘{𝑎, 𝑁}))
6		hashprg 14431	. . . . . . . . . . . 12 ⊢ ((𝑎 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉) → (𝑎 ≠ 𝑁 ↔ (♯‘{𝑎, 𝑁}) = 2))
7	6	adantrr 717	. . . . . . . . . . 11 ⊢ ((𝑎 ∈ 𝑉 ∧ (𝑁 ∈ 𝑉 ∧ 𝑥 ∈ 𝒫 𝑉)) → (𝑎 ≠ 𝑁 ↔ (♯‘{𝑎, 𝑁}) = 2))
8	7	biimpcd 249	. . . . . . . . . 10 ⊢ (𝑎 ≠ 𝑁 → ((𝑎 ∈ 𝑉 ∧ (𝑁 ∈ 𝑉 ∧ 𝑥 ∈ 𝒫 𝑉)) → (♯‘{𝑎, 𝑁}) = 2))
9	8	adantr 480	. . . . . . . . 9 ⊢ ((𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁}) → ((𝑎 ∈ 𝑉 ∧ (𝑁 ∈ 𝑉 ∧ 𝑥 ∈ 𝒫 𝑉)) → (♯‘{𝑎, 𝑁}) = 2))
10	9	imp 406	. . . . . . . 8 ⊢ (((𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁}) ∧ (𝑎 ∈ 𝑉 ∧ (𝑁 ∈ 𝑉 ∧ 𝑥 ∈ 𝒫 𝑉))) → (♯‘{𝑎, 𝑁}) = 2)
11	5, 10	eqtrd 2775	. . . . . . 7 ⊢ (((𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁}) ∧ (𝑎 ∈ 𝑉 ∧ (𝑁 ∈ 𝑉 ∧ 𝑥 ∈ 𝒫 𝑉))) → (♯‘𝑥) = 2)
12	11	an13s 651	. . . . . 6 ⊢ (((𝑁 ∈ 𝑉 ∧ 𝑥 ∈ 𝒫 𝑉) ∧ (𝑎 ∈ 𝑉 ∧ (𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁}))) → (♯‘𝑥) = 2)
13	12	rexlimdvaa 3154	. . . . 5 ⊢ ((𝑁 ∈ 𝑉 ∧ 𝑥 ∈ 𝒫 𝑉) → (∃𝑎 ∈ 𝑉 (𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁}) → (♯‘𝑥) = 2))
14	13	ss2rabdv 4086	. . . 4 ⊢ (𝑁 ∈ 𝑉 → {𝑥 ∈ 𝒫 𝑉 ∣ ∃𝑎 ∈ 𝑉 (𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁})} ⊆ {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2})
15		cusgrfi.p	. . . . . 6 ⊢ 𝑃 = {𝑥 ∈ 𝒫 𝑉 ∣ ∃𝑎 ∈ 𝑉 (𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁})}
16	15	a1i 11	. . . . 5 ⊢ ((Edg‘𝐺) = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2} → 𝑃 = {𝑥 ∈ 𝒫 𝑉 ∣ ∃𝑎 ∈ 𝑉 (𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁})})
17		id 22	. . . . 5 ⊢ ((Edg‘𝐺) = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2} → (Edg‘𝐺) = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2})
18	16, 17	sseq12d 4029	. . . 4 ⊢ ((Edg‘𝐺) = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2} → (𝑃 ⊆ (Edg‘𝐺) ↔ {𝑥 ∈ 𝒫 𝑉 ∣ ∃𝑎 ∈ 𝑉 (𝑎 ≠ 𝑁 ∧ 𝑥 = {𝑎, 𝑁})} ⊆ {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2}))
19	14, 18	imbitrrid 246	. . 3 ⊢ ((Edg‘𝐺) = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2} → (𝑁 ∈ 𝑉 → 𝑃 ⊆ (Edg‘𝐺)))
20	3, 19	syl 17	. 2 ⊢ (𝐺 ∈ ComplUSGraph → (𝑁 ∈ 𝑉 → 𝑃 ⊆ (Edg‘𝐺)))
21	20	imp 406	1 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑃 ⊆ (Edg‘𝐺))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1537 ∈ wcel 2106 ≠ wne 2938 ∃wrex 3068 {crab 3433 ⊆ wss 3963 𝒫 cpw 4605 {cpr 4633 ‘cfv 6563 2c2 12319 ♯chash 14366 Vtxcvtx 29028 Edgcedg 29079 ComplUSGraphccusgr 29442

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-pow 5371 ax-pr 5438 ax-un 7754 ax-cnex 11209 ax-resscn 11210 ax-1cn 11211 ax-icn 11212 ax-addcl 11213 ax-addrcl 11214 ax-mulcl 11215 ax-mulrcl 11216 ax-mulcom 11217 ax-addass 11218 ax-mulass 11219 ax-distr 11220 ax-i2m1 11221 ax-1ne0 11222 ax-1rid 11223 ax-rnegex 11224 ax-rrecex 11225 ax-cnre 11226 ax-pre-lttri 11227 ax-pre-lttrn 11228 ax-pre-ltadd 11229 ax-pre-mulgt0 11230

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 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-nel 3045 df-ral 3060 df-rex 3069 df-reu 3379 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-pss 3983 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-int 4952 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5583 df-eprel 5589 df-po 5597 df-so 5598 df-fr 5641 df-we 5643 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-pred 6323 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-om 7888 df-1st 8013 df-2nd 8014 df-frecs 8305 df-wrecs 8336 df-recs 8410 df-rdg 8449 df-1o 8505 df-2o 8506 df-oadd 8509 df-er 8744 df-en 8985 df-dom 8986 df-sdom 8987 df-fin 8988 df-dju 9939 df-card 9977 df-pnf 11295 df-mnf 11296 df-xr 11297 df-ltxr 11298 df-le 11299 df-sub 11492 df-neg 11493 df-nn 12265 df-2 12327 df-n0 12525 df-xnn0 12598 df-z 12612 df-uz 12877 df-fz 13545 df-hash 14367 df-edg 29080 df-upgr 29114 df-umgr 29115 df-usgr 29183 df-nbgr 29365 df-uvtx 29418 df-cplgr 29443 df-cusgr 29444

This theorem is referenced by: cusgrfi 29491

W3C validator