Theorem cusgrres 40664

Description: Restricting a complete simple graph. (Contributed by Alexander van der Vekens, 2-Jan-2018.)

Hypotheses

Ref	Expression
cusgrres.v	⊢ 𝑉 = (Vtx‘𝐺)
cusgrres.e	⊢ 𝐸 = (Edg‘𝐺)
cusgrres.f	⊢ 𝐹 = {𝑒 ∈ 𝐸 ∣ 𝑁 ∉ 𝑒}
cusgrres.s	⊢ 𝑆 = ⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩

Assertion

Ref	Expression
cusgrres	⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ ComplUSGraph)

Distinct variable groups:   𝑒,𝐸   𝑒,𝐺   𝑒,𝑁   𝑒,𝑉

Allowed substitution hints:   𝑆(𝑒)   𝐹(𝑒)

Proof of Theorem cusgrres

Dummy variables 𝑛 𝑣 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		cusgrusgr 40641	. . 3 ⊢ (𝐺 ∈ ComplUSGraph → 𝐺 ∈ USGraph )
2		cusgrres.v	. . . 4 ⊢ 𝑉 = (Vtx‘𝐺)
3		cusgrres.e	. . . 4 ⊢ 𝐸 = (Edg‘𝐺)
4		cusgrres.f	. . . 4 ⊢ 𝐹 = {𝑒 ∈ 𝐸 ∣ 𝑁 ∉ 𝑒}
5		cusgrres.s	. . . 4 ⊢ 𝑆 = ⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩
6	2, 3, 4, 5	usgrres1 40534	. . 3 ⊢ ((𝐺 ∈ USGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ USGraph )
7	1, 6	sylan 487	. 2 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ USGraph )
8		iscusgr 40640	. . . 4 ⊢ (𝐺 ∈ ComplUSGraph ↔ (𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph))
9		usgrupgr 40412	. . . . . . . . 9 ⊢ (𝐺 ∈ USGraph → 𝐺 ∈ UPGraph )
10	9	adantr 480	. . . . . . . 8 ⊢ ((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) → 𝐺 ∈ UPGraph )
11	10	anim1i 590	. . . . . . 7 ⊢ (((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) → (𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉))
12	11	anim1i 590	. . . . . 6 ⊢ ((((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → ((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})))
13	2	iscplgr 40636	. . . . . . . . 9 ⊢ (𝐺 ∈ USGraph → (𝐺 ∈ ComplGraph ↔ ∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺)))
14		eldifi 3694	. . . . . . . . . . . . 13 ⊢ (𝑣 ∈ (𝑉 ∖ {𝑁}) → 𝑣 ∈ 𝑉)
15	14	ad2antll 761	. . . . . . . . . . . 12 ⊢ ((𝐺 ∈ USGraph ∧ (𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁}))) → 𝑣 ∈ 𝑉)
16		eleq1 2676	. . . . . . . . . . . . 13 ⊢ (𝑛 = 𝑣 → (𝑛 ∈ (UnivVtx‘𝐺) ↔ 𝑣 ∈ (UnivVtx‘𝐺)))
17	16	rspcv 3278	. . . . . . . . . . . 12 ⊢ (𝑣 ∈ 𝑉 → (∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺) → 𝑣 ∈ (UnivVtx‘𝐺)))
18	15, 17	syl 17	. . . . . . . . . . 11 ⊢ ((𝐺 ∈ USGraph ∧ (𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁}))) → (∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺) → 𝑣 ∈ (UnivVtx‘𝐺)))
19	18	ex 449	. . . . . . . . . 10 ⊢ (𝐺 ∈ USGraph → ((𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → (∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺) → 𝑣 ∈ (UnivVtx‘𝐺))))
20	19	com23 84	. . . . . . . . 9 ⊢ (𝐺 ∈ USGraph → (∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺) → ((𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝐺))))
21	13, 20	sylbid 229	. . . . . . . 8 ⊢ (𝐺 ∈ USGraph → (𝐺 ∈ ComplGraph → ((𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝐺))))
22	21	imp 444	. . . . . . 7 ⊢ ((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) → ((𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝐺)))
23	22	impl 648	. . . . . 6 ⊢ ((((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝐺))
24	2, 3, 4, 5	uvtxupgrres 40635	. . . . . 6 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → (𝑣 ∈ (UnivVtx‘𝐺) → 𝑣 ∈ (UnivVtx‘𝑆)))
25	12, 23, 24	sylc 63	. . . . 5 ⊢ ((((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝑆))
26	25	ralrimiva 2949	. . . 4 ⊢ (((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) → ∀𝑣 ∈ (𝑉 ∖ {𝑁})𝑣 ∈ (UnivVtx‘𝑆))
27	8, 26	sylanb 488	. . 3 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → ∀𝑣 ∈ (𝑉 ∖ {𝑁})𝑣 ∈ (UnivVtx‘𝑆))
28		opex 4859	. . . . 5 ⊢ ⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩ ∈ V
29	5, 28	eqeltri 2684	. . . 4 ⊢ 𝑆 ∈ V
30	2, 3, 4, 5	upgrres1lem2 40530	. . . . . 6 ⊢ (Vtx‘𝑆) = (𝑉 ∖ {𝑁})
31	30	eqcomi 2619	. . . . 5 ⊢ (𝑉 ∖ {𝑁}) = (Vtx‘𝑆)
32	31	iscplgr 40636	. . . 4 ⊢ (𝑆 ∈ V → (𝑆 ∈ ComplGraph ↔ ∀𝑣 ∈ (𝑉 ∖ {𝑁})𝑣 ∈ (UnivVtx‘𝑆)))
33	29, 32	mp1i 13	. . 3 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → (𝑆 ∈ ComplGraph ↔ ∀𝑣 ∈ (𝑉 ∖ {𝑁})𝑣 ∈ (UnivVtx‘𝑆)))
34	27, 33	mpbird 246	. 2 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ ComplGraph)
35		iscusgr 40640	. 2 ⊢ (𝑆 ∈ ComplUSGraph ↔ (𝑆 ∈ USGraph ∧ 𝑆 ∈ ComplGraph))
36	7, 34, 35	sylanbrc 695	1 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ ComplUSGraph)

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   = wceq 1475   ∈ wcel 1977   ∉ wnel 2781  ∀wral 2896  {crab 2900  Vcvv 3173   ∖ cdif 3537  {csn 4125  ⟨cop 4131   I cid 4948   ↾ cres 5040  ‘cfv 5804  Vtxcvtx 25673   UPGraph cupgr 25747  Edgcedga 25792   USGraph cusgr 40379  UnivVtxcuvtxa 40551  ComplGraphccplgr 40552  ComplUSGraphccusgr 40553

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-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-fal 1481  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-2o 7448  df-oadd 7451  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-card 8648  df-cda 8873  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-n0 11170  df-z 11255  df-uz 11564  df-fz 12198  df-hash 12980  df-vtx 25675  df-iedg 25676  df-uhgr 25724  df-upgr 25749  df-umgr 25750  df-edga 25793  df-uspgr 40380  df-usgr 40381  df-nbgr 40554  df-uvtxa 40556  df-cplgr 40557  df-cusgr 40558

This theorem is referenced by:  cusgrsize  40670