Theorem lbsextlem4 19161

Description: Lemma for lbsext 19163. lbsextlem3 19160 satisfies the conditions for the application of Zorn's lemma zorn 9329 (thus invoking AC), and so there is a maximal linearly independent set extending 𝐶. Here we prove that such a set is a basis. (Contributed by Mario Carneiro, 25-Jun-2014.)

Hypotheses

Ref	Expression
lbsext.v	⊢ 𝑉 = (Base‘𝑊)
lbsext.j	⊢ 𝐽 = (LBasis‘𝑊)
lbsext.n	⊢ 𝑁 = (LSpan‘𝑊)
lbsext.w	⊢ (𝜑 → 𝑊 ∈ LVec)
lbsext.c	⊢ (𝜑 → 𝐶 ⊆ 𝑉)
lbsext.x	⊢ (𝜑 → ∀𝑥 ∈ 𝐶 ¬ 𝑥 ∈ (𝑁‘(𝐶 ∖ {𝑥})))
lbsext.s	⊢ 𝑆 = {𝑧 ∈ 𝒫 𝑉 ∣ (𝐶 ⊆ 𝑧 ∧ ∀𝑥 ∈ 𝑧 ¬ 𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥})))}
lbsext.k	⊢ (𝜑 → 𝒫 𝑉 ∈ dom card)

Assertion

Ref	Expression
lbsextlem4	⊢ (𝜑 → ∃𝑠 ∈ 𝐽 𝐶 ⊆ 𝑠)

Distinct variable groups:   𝑥,𝐽   𝜑,𝑥,𝑠   𝑆,𝑠,𝑥   𝑥,𝑧,𝐶   𝑥,𝑁,𝑧   𝑥,𝑉,𝑧   𝑥,𝑊   𝑧,𝑠   𝜑,𝑠

Allowed substitution hints:   𝜑(𝑧)   𝐶(𝑠)   𝑆(𝑧)   𝐽(𝑧,𝑠)   𝑁(𝑠)   𝑉(𝑠)   𝑊(𝑧,𝑠)

Proof of Theorem lbsextlem4

Dummy variables 𝑢 𝑤 𝑦 𝑡 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		lbsext.k	. . . 4 ⊢ (𝜑 → 𝒫 𝑉 ∈ dom card)
2		lbsext.s	. . . . 5 ⊢ 𝑆 = {𝑧 ∈ 𝒫 𝑉 ∣ (𝐶 ⊆ 𝑧 ∧ ∀𝑥 ∈ 𝑧 ¬ 𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥})))}
3		ssrab2 3687	. . . . 5 ⊢ {𝑧 ∈ 𝒫 𝑉 ∣ (𝐶 ⊆ 𝑧 ∧ ∀𝑥 ∈ 𝑧 ¬ 𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥})))} ⊆ 𝒫 𝑉
4	2, 3	eqsstri 3635	. . . 4 ⊢ 𝑆 ⊆ 𝒫 𝑉
5		ssnum 8862	. . . 4 ⊢ ((𝒫 𝑉 ∈ dom card ∧ 𝑆 ⊆ 𝒫 𝑉) → 𝑆 ∈ dom card)
6	1, 4, 5	sylancl 694	. . 3 ⊢ (𝜑 → 𝑆 ∈ dom card)
7		lbsext.v	. . . 4 ⊢ 𝑉 = (Base‘𝑊)
8		lbsext.j	. . . 4 ⊢ 𝐽 = (LBasis‘𝑊)
9		lbsext.n	. . . 4 ⊢ 𝑁 = (LSpan‘𝑊)
10		lbsext.w	. . . 4 ⊢ (𝜑 → 𝑊 ∈ LVec)
11		lbsext.c	. . . 4 ⊢ (𝜑 → 𝐶 ⊆ 𝑉)
12		lbsext.x	. . . 4 ⊢ (𝜑 → ∀𝑥 ∈ 𝐶 ¬ 𝑥 ∈ (𝑁‘(𝐶 ∖ {𝑥})))
13	7, 8, 9, 10, 11, 12, 2	lbsextlem1 19158	. . 3 ⊢ (𝜑 → 𝑆 ≠ ∅)
14	10	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦)) → 𝑊 ∈ LVec)
15	11	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦)) → 𝐶 ⊆ 𝑉)
16	12	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦)) → ∀𝑥 ∈ 𝐶 ¬ 𝑥 ∈ (𝑁‘(𝐶 ∖ {𝑥})))
17		eqid 2622	. . . . . 6 ⊢ (LSubSp‘𝑊) = (LSubSp‘𝑊)
18		simpr1 1067	. . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦)) → 𝑦 ⊆ 𝑆)
19		simpr2 1068	. . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦)) → 𝑦 ≠ ∅)
20		simpr3 1069	. . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦)) → [⊊] Or 𝑦)
21		eqid 2622	. . . . . 6 ⊢ ∪ 𝑢 ∈ 𝑦 (𝑁‘(𝑢 ∖ {𝑥})) = ∪ 𝑢 ∈ 𝑦 (𝑁‘(𝑢 ∖ {𝑥}))
22	7, 8, 9, 14, 15, 16, 2, 17, 18, 19, 20, 21	lbsextlem3 19160	. . . . 5 ⊢ ((𝜑 ∧ (𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦)) → ∪ 𝑦 ∈ 𝑆)
23	22	ex 450	. . . 4 ⊢ (𝜑 → ((𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦) → ∪ 𝑦 ∈ 𝑆))
24	23	alrimiv 1855	. . 3 ⊢ (𝜑 → ∀𝑦((𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦) → ∪ 𝑦 ∈ 𝑆))
25		zornn0g 9327	. . 3 ⊢ ((𝑆 ∈ dom card ∧ 𝑆 ≠ ∅ ∧ ∀𝑦((𝑦 ⊆ 𝑆 ∧ 𝑦 ≠ ∅ ∧ [⊊] Or 𝑦) → ∪ 𝑦 ∈ 𝑆)) → ∃𝑠 ∈ 𝑆 ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)
26	6, 13, 24, 25	syl3anc 1326	. 2 ⊢ (𝜑 → ∃𝑠 ∈ 𝑆 ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)
27		simprl 794	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → 𝑠 ∈ 𝑆)
28		sseq2 3627	. . . . . . . . . . 11 ⊢ (𝑧 = 𝑠 → (𝐶 ⊆ 𝑧 ↔ 𝐶 ⊆ 𝑠))
29		difeq1 3721	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = 𝑠 → (𝑧 ∖ {𝑥}) = (𝑠 ∖ {𝑥}))
30	29	fveq2d 6195	. . . . . . . . . . . . . 14 ⊢ (𝑧 = 𝑠 → (𝑁‘(𝑧 ∖ {𝑥})) = (𝑁‘(𝑠 ∖ {𝑥})))
31	30	eleq2d 2687	. . . . . . . . . . . . 13 ⊢ (𝑧 = 𝑠 → (𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥})) ↔ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥}))))
32	31	notbid 308	. . . . . . . . . . . 12 ⊢ (𝑧 = 𝑠 → (¬ 𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥})) ↔ ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥}))))
33	32	raleqbi1dv 3146	. . . . . . . . . . 11 ⊢ (𝑧 = 𝑠 → (∀𝑥 ∈ 𝑧 ¬ 𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥})) ↔ ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥}))))
34	28, 33	anbi12d 747	. . . . . . . . . 10 ⊢ (𝑧 = 𝑠 → ((𝐶 ⊆ 𝑧 ∧ ∀𝑥 ∈ 𝑧 ¬ 𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥}))) ↔ (𝐶 ⊆ 𝑠 ∧ ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})))))
35	34, 2	elrab2 3366	. . . . . . . . 9 ⊢ (𝑠 ∈ 𝑆 ↔ (𝑠 ∈ 𝒫 𝑉 ∧ (𝐶 ⊆ 𝑠 ∧ ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})))))
36	27, 35	sylib 208	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → (𝑠 ∈ 𝒫 𝑉 ∧ (𝐶 ⊆ 𝑠 ∧ ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})))))
37	36	simpld 475	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → 𝑠 ∈ 𝒫 𝑉)
38	37	elpwid 4170	. . . . . 6 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → 𝑠 ⊆ 𝑉)
39		lveclmod 19106	. . . . . . . . . 10 ⊢ (𝑊 ∈ LVec → 𝑊 ∈ LMod)
40	10, 39	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑊 ∈ LMod)
41	40	adantr 481	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → 𝑊 ∈ LMod)
42	7, 9	lspssv 18983	. . . . . . . 8 ⊢ ((𝑊 ∈ LMod ∧ 𝑠 ⊆ 𝑉) → (𝑁‘𝑠) ⊆ 𝑉)
43	41, 38, 42	syl2anc 693	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → (𝑁‘𝑠) ⊆ 𝑉)
44		ssun1 3776	. . . . . . . . . . . 12 ⊢ 𝑠 ⊆ (𝑠 ∪ {𝑤})
45	44	a1i 11	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → 𝑠 ⊆ (𝑠 ∪ {𝑤}))
46		ssun2 3777	. . . . . . . . . . . . . 14 ⊢ {𝑤} ⊆ (𝑠 ∪ {𝑤})
47		vsnid 4209	. . . . . . . . . . . . . 14 ⊢ 𝑤 ∈ {𝑤}
48	46, 47	sselii 3600	. . . . . . . . . . . . 13 ⊢ 𝑤 ∈ (𝑠 ∪ {𝑤})
49	7, 9	lspssid 18985	. . . . . . . . . . . . . . . 16 ⊢ ((𝑊 ∈ LMod ∧ 𝑠 ⊆ 𝑉) → 𝑠 ⊆ (𝑁‘𝑠))
50	41, 38, 49	syl2anc 693	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → 𝑠 ⊆ (𝑁‘𝑠))
51	50	adantr 481	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → 𝑠 ⊆ (𝑁‘𝑠))
52		eldifn 3733	. . . . . . . . . . . . . . 15 ⊢ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) → ¬ 𝑤 ∈ (𝑁‘𝑠))
53	52	adantl 482	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ¬ 𝑤 ∈ (𝑁‘𝑠))
54	51, 53	ssneldd 3606	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ¬ 𝑤 ∈ 𝑠)
55		nelne1 2890	. . . . . . . . . . . . 13 ⊢ ((𝑤 ∈ (𝑠 ∪ {𝑤}) ∧ ¬ 𝑤 ∈ 𝑠) → (𝑠 ∪ {𝑤}) ≠ 𝑠)
56	48, 54, 55	sylancr 695	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → (𝑠 ∪ {𝑤}) ≠ 𝑠)
57	56	necomd 2849	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → 𝑠 ≠ (𝑠 ∪ {𝑤}))
58		df-pss 3590	. . . . . . . . . . 11 ⊢ (𝑠 ⊊ (𝑠 ∪ {𝑤}) ↔ (𝑠 ⊆ (𝑠 ∪ {𝑤}) ∧ 𝑠 ≠ (𝑠 ∪ {𝑤})))
59	45, 57, 58	sylanbrc 698	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → 𝑠 ⊊ (𝑠 ∪ {𝑤}))
60	38	adantr 481	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → 𝑠 ⊆ 𝑉)
61		eldifi 3732	. . . . . . . . . . . . . . . 16 ⊢ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) → 𝑤 ∈ 𝑉)
62	61	adantl 482	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → 𝑤 ∈ 𝑉)
63	62	snssd 4340	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → {𝑤} ⊆ 𝑉)
64	60, 63	unssd 3789	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → (𝑠 ∪ {𝑤}) ⊆ 𝑉)
65		fvex 6201	. . . . . . . . . . . . . . 15 ⊢ (Base‘𝑊) ∈ V
66	7, 65	eqeltri 2697	. . . . . . . . . . . . . 14 ⊢ 𝑉 ∈ V
67	66	elpw2 4828	. . . . . . . . . . . . 13 ⊢ ((𝑠 ∪ {𝑤}) ∈ 𝒫 𝑉 ↔ (𝑠 ∪ {𝑤}) ⊆ 𝑉)
68	64, 67	sylibr 224	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → (𝑠 ∪ {𝑤}) ∈ 𝒫 𝑉)
69	36	simprd 479	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → (𝐶 ⊆ 𝑠 ∧ ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥}))))
70	69	simpld 475	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → 𝐶 ⊆ 𝑠)
71	70	adantr 481	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → 𝐶 ⊆ 𝑠)
72	71, 44	syl6ss 3615	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → 𝐶 ⊆ (𝑠 ∪ {𝑤}))
73	10	ad2antrr 762	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑊 ∈ LVec)
74	38	adantr 481	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑠 ⊆ 𝑉)
75	74	ssdifssd 3748	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → (𝑠 ∖ {𝑥}) ⊆ 𝑉)
76	62	adantrr 753	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑤 ∈ 𝑉)
77		simprrr 805	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})))
78		simprrl 804	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑥 ∈ 𝑠)
79	54	adantrr 753	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → ¬ 𝑤 ∈ 𝑠)
80		nelne2 2891	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝑥 ∈ 𝑠 ∧ ¬ 𝑤 ∈ 𝑠) → 𝑥 ≠ 𝑤)
81	78, 79, 80	syl2anc 693	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑥 ≠ 𝑤)
82		nelsn 4212	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (𝑥 ≠ 𝑤 → ¬ 𝑥 ∈ {𝑤})
83	81, 82	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → ¬ 𝑥 ∈ {𝑤})
84		disjsn 4246	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (({𝑤} ∩ {𝑥}) = ∅ ↔ ¬ 𝑥 ∈ {𝑤})
85	83, 84	sylibr 224	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → ({𝑤} ∩ {𝑥}) = ∅)
86		disj3 4021	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (({𝑤} ∩ {𝑥}) = ∅ ↔ {𝑤} = ({𝑤} ∖ {𝑥}))
87	85, 86	sylib 208	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → {𝑤} = ({𝑤} ∖ {𝑥}))
88	87	uneq2d 3767	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → ((𝑠 ∖ {𝑥}) ∪ {𝑤}) = ((𝑠 ∖ {𝑥}) ∪ ({𝑤} ∖ {𝑥})))
89		difundir 3880	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((𝑠 ∪ {𝑤}) ∖ {𝑥}) = ((𝑠 ∖ {𝑥}) ∪ ({𝑤} ∖ {𝑥}))
90	88, 89	syl6reqr 2675	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → ((𝑠 ∪ {𝑤}) ∖ {𝑥}) = ((𝑠 ∖ {𝑥}) ∪ {𝑤}))
91	90	fveq2d 6195	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})) = (𝑁‘((𝑠 ∖ {𝑥}) ∪ {𝑤})))
92	77, 91	eleqtrd 2703	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑥 ∈ (𝑁‘((𝑠 ∖ {𝑥}) ∪ {𝑤})))
93	69	simprd 479	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})))
94	93	adantr 481	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})))
95		rsp 2929	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})) → (𝑥 ∈ 𝑠 → ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥}))))
96	94, 78, 95	sylc 65	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})))
97	92, 96	eldifd 3585	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑥 ∈ ((𝑁‘((𝑠 ∖ {𝑥}) ∪ {𝑤})) ∖ (𝑁‘(𝑠 ∖ {𝑥}))))
98	7, 17, 9	lspsolv 19143	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑊 ∈ LVec ∧ ((𝑠 ∖ {𝑥}) ⊆ 𝑉 ∧ 𝑤 ∈ 𝑉 ∧ 𝑥 ∈ ((𝑁‘((𝑠 ∖ {𝑥}) ∪ {𝑤})) ∖ (𝑁‘(𝑠 ∖ {𝑥}))))) → 𝑤 ∈ (𝑁‘((𝑠 ∖ {𝑥}) ∪ {𝑥})))
99	73, 75, 76, 97, 98	syl13anc 1328	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑤 ∈ (𝑁‘((𝑠 ∖ {𝑥}) ∪ {𝑥})))
100		undif1 4043	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝑠 ∖ {𝑥}) ∪ {𝑥}) = (𝑠 ∪ {𝑥})
101	78	snssd 4340	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → {𝑥} ⊆ 𝑠)
102		ssequn2 3786	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ({𝑥} ⊆ 𝑠 ↔ (𝑠 ∪ {𝑥}) = 𝑠)
103	101, 102	sylib 208	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → (𝑠 ∪ {𝑥}) = 𝑠)
104	100, 103	syl5eq 2668	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → ((𝑠 ∖ {𝑥}) ∪ {𝑥}) = 𝑠)
105	104	fveq2d 6195	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → (𝑁‘((𝑠 ∖ {𝑥}) ∪ {𝑥})) = (𝑁‘𝑠))
106	99, 105	eleqtrd 2703	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ (𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)) ∧ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))) → 𝑤 ∈ (𝑁‘𝑠))
107	106	expr 643	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ((𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))) → 𝑤 ∈ (𝑁‘𝑠)))
108	53, 107	mtod 189	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ¬ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))
109		imnan 438	. . . . . . . . . . . . . . . 16 ⊢ ((𝑥 ∈ 𝑠 → ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))) ↔ ¬ (𝑥 ∈ 𝑠 ∧ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))
110	108, 109	sylibr 224	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → (𝑥 ∈ 𝑠 → ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))
111	110	ralrimiv 2965	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})))
112		difssd 3738	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → (𝑠 ∖ {𝑤}) ⊆ 𝑠)
113	7, 9	lspss 18984	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑊 ∈ LMod ∧ 𝑠 ⊆ 𝑉 ∧ (𝑠 ∖ {𝑤}) ⊆ 𝑠) → (𝑁‘(𝑠 ∖ {𝑤})) ⊆ (𝑁‘𝑠))
114	41, 38, 112, 113	syl3anc 1326	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → (𝑁‘(𝑠 ∖ {𝑤})) ⊆ (𝑁‘𝑠))
115	114	adantr 481	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → (𝑁‘(𝑠 ∖ {𝑤})) ⊆ (𝑁‘𝑠))
116	115, 53	ssneldd 3606	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ¬ 𝑤 ∈ (𝑁‘(𝑠 ∖ {𝑤})))
117		vex 3203	. . . . . . . . . . . . . . . 16 ⊢ 𝑤 ∈ V
118		id 22	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 = 𝑤 → 𝑥 = 𝑤)
119		sneq 4187	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑥 = 𝑤 → {𝑥} = {𝑤})
120	119	difeq2d 3728	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑥 = 𝑤 → ((𝑠 ∪ {𝑤}) ∖ {𝑥}) = ((𝑠 ∪ {𝑤}) ∖ {𝑤}))
121		difun2 4048	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑠 ∪ {𝑤}) ∖ {𝑤}) = (𝑠 ∖ {𝑤})
122	120, 121	syl6eq 2672	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 = 𝑤 → ((𝑠 ∪ {𝑤}) ∖ {𝑥}) = (𝑠 ∖ {𝑤}))
123	122	fveq2d 6195	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 = 𝑤 → (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})) = (𝑁‘(𝑠 ∖ {𝑤})))
124	118, 123	eleq12d 2695	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = 𝑤 → (𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})) ↔ 𝑤 ∈ (𝑁‘(𝑠 ∖ {𝑤}))))
125	124	notbid 308	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = 𝑤 → (¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})) ↔ ¬ 𝑤 ∈ (𝑁‘(𝑠 ∖ {𝑤}))))
126	117, 125	ralsn 4222	. . . . . . . . . . . . . . 15 ⊢ (∀𝑥 ∈ {𝑤} ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})) ↔ ¬ 𝑤 ∈ (𝑁‘(𝑠 ∖ {𝑤})))
127	116, 126	sylibr 224	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ∀𝑥 ∈ {𝑤} ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})))
128		ralun 3795	. . . . . . . . . . . . . 14 ⊢ ((∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})) ∧ ∀𝑥 ∈ {𝑤} ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))) → ∀𝑥 ∈ (𝑠 ∪ {𝑤}) ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})))
129	111, 127, 128	syl2anc 693	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ∀𝑥 ∈ (𝑠 ∪ {𝑤}) ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})))
130	72, 129	jca 554	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → (𝐶 ⊆ (𝑠 ∪ {𝑤}) ∧ ∀𝑥 ∈ (𝑠 ∪ {𝑤}) ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))
131		sseq2 3627	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑠 ∪ {𝑤}) → (𝐶 ⊆ 𝑧 ↔ 𝐶 ⊆ (𝑠 ∪ {𝑤})))
132		difeq1 3721	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑧 = (𝑠 ∪ {𝑤}) → (𝑧 ∖ {𝑥}) = ((𝑠 ∪ {𝑤}) ∖ {𝑥}))
133	132	fveq2d 6195	. . . . . . . . . . . . . . . . 17 ⊢ (𝑧 = (𝑠 ∪ {𝑤}) → (𝑁‘(𝑧 ∖ {𝑥})) = (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})))
134	133	eleq2d 2687	. . . . . . . . . . . . . . . 16 ⊢ (𝑧 = (𝑠 ∪ {𝑤}) → (𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥})) ↔ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))
135	134	notbid 308	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = (𝑠 ∪ {𝑤}) → (¬ 𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥})) ↔ ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))
136	135	raleqbi1dv 3146	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑠 ∪ {𝑤}) → (∀𝑥 ∈ 𝑧 ¬ 𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥})) ↔ ∀𝑥 ∈ (𝑠 ∪ {𝑤}) ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥}))))
137	131, 136	anbi12d 747	. . . . . . . . . . . . 13 ⊢ (𝑧 = (𝑠 ∪ {𝑤}) → ((𝐶 ⊆ 𝑧 ∧ ∀𝑥 ∈ 𝑧 ¬ 𝑥 ∈ (𝑁‘(𝑧 ∖ {𝑥}))) ↔ (𝐶 ⊆ (𝑠 ∪ {𝑤}) ∧ ∀𝑥 ∈ (𝑠 ∪ {𝑤}) ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})))))
138	137, 2	elrab2 3366	. . . . . . . . . . . 12 ⊢ ((𝑠 ∪ {𝑤}) ∈ 𝑆 ↔ ((𝑠 ∪ {𝑤}) ∈ 𝒫 𝑉 ∧ (𝐶 ⊆ (𝑠 ∪ {𝑤}) ∧ ∀𝑥 ∈ (𝑠 ∪ {𝑤}) ¬ 𝑥 ∈ (𝑁‘((𝑠 ∪ {𝑤}) ∖ {𝑥})))))
139	68, 130, 138	sylanbrc 698	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → (𝑠 ∪ {𝑤}) ∈ 𝑆)
140		simplrr 801	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)
141		psseq2 3695	. . . . . . . . . . . . 13 ⊢ (𝑡 = (𝑠 ∪ {𝑤}) → (𝑠 ⊊ 𝑡 ↔ 𝑠 ⊊ (𝑠 ∪ {𝑤})))
142	141	notbid 308	. . . . . . . . . . . 12 ⊢ (𝑡 = (𝑠 ∪ {𝑤}) → (¬ 𝑠 ⊊ 𝑡 ↔ ¬ 𝑠 ⊊ (𝑠 ∪ {𝑤})))
143	142	rspcv 3305	. . . . . . . . . . 11 ⊢ ((𝑠 ∪ {𝑤}) ∈ 𝑆 → (∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡 → ¬ 𝑠 ⊊ (𝑠 ∪ {𝑤})))
144	139, 140, 143	sylc 65	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) ∧ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠))) → ¬ 𝑠 ⊊ (𝑠 ∪ {𝑤}))
145	59, 144	pm2.65da 600	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → ¬ 𝑤 ∈ (𝑉 ∖ (𝑁‘𝑠)))
146	145	eq0rdv 3979	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → (𝑉 ∖ (𝑁‘𝑠)) = ∅)
147		ssdif0 3942	. . . . . . . 8 ⊢ (𝑉 ⊆ (𝑁‘𝑠) ↔ (𝑉 ∖ (𝑁‘𝑠)) = ∅)
148	146, 147	sylibr 224	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → 𝑉 ⊆ (𝑁‘𝑠))
149	43, 148	eqssd 3620	. . . . . 6 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → (𝑁‘𝑠) = 𝑉)
150	10	adantr 481	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → 𝑊 ∈ LVec)
151	7, 8, 9	islbs2 19154	. . . . . . 7 ⊢ (𝑊 ∈ LVec → (𝑠 ∈ 𝐽 ↔ (𝑠 ⊆ 𝑉 ∧ (𝑁‘𝑠) = 𝑉 ∧ ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})))))
152	150, 151	syl 17	. . . . . 6 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → (𝑠 ∈ 𝐽 ↔ (𝑠 ⊆ 𝑉 ∧ (𝑁‘𝑠) = 𝑉 ∧ ∀𝑥 ∈ 𝑠 ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})))))
153	38, 149, 93, 152	mpbir3and 1245	. . . . 5 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → 𝑠 ∈ 𝐽)
154	153, 70	jca 554	. . . 4 ⊢ ((𝜑 ∧ (𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡)) → (𝑠 ∈ 𝐽 ∧ 𝐶 ⊆ 𝑠))
155	154	ex 450	. . 3 ⊢ (𝜑 → ((𝑠 ∈ 𝑆 ∧ ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡) → (𝑠 ∈ 𝐽 ∧ 𝐶 ⊆ 𝑠)))
156	155	reximdv2 3014	. 2 ⊢ (𝜑 → (∃𝑠 ∈ 𝑆 ∀𝑡 ∈ 𝑆 ¬ 𝑠 ⊊ 𝑡 → ∃𝑠 ∈ 𝐽 𝐶 ⊆ 𝑠))
157	26, 156	mpd 15	1 ⊢ (𝜑 → ∃𝑠 ∈ 𝐽 𝐶 ⊆ 𝑠)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 196   ∧ wa 384   ∧ w3a 1037  ∀wal 1481   = wceq 1483   ∈ wcel 1990   ≠ wne 2794  ∀wral 2912  ∃wrex 2913  {crab 2916  Vcvv 3200   ∖ cdif 3571   ∪ cun 3572   ∩ cin 3573   ⊆ wss 3574   ⊊ wpss 3575  ∅c0 3915  𝒫 cpw 4158  {csn 4177  ∪ cuni 4436  ∪ ciun 4520   Or wor 5034  dom cdm 5114  ‘cfv 5888   [⊊] crpss 6936  cardccrd 8761  Basecbs 15857  LModclmod 18863  LSubSpclss 18932  LSpanclspn 18971  LBasisclbs 19074  LVecclvec 19102

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-rep 4771  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-rmo 2920  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-se 5074  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-isom 5897  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-rpss 6937  df-om 7066  df-1st 7168  df-2nd 7169  df-tpos 7352  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-card 8765  df-cda 8990  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-2 11079  df-3 11080  df-ndx 15860  df-slot 15861  df-base 15863  df-sets 15864  df-ress 15865  df-plusg 15954  df-mulr 15955  df-0g 16102  df-mgm 17242  df-sgrp 17284  df-mnd 17295  df-grp 17425  df-minusg 17426  df-sbg 17427  df-cmn 18195  df-abl 18196  df-mgp 18490  df-ur 18502  df-ring 18549  df-oppr 18623  df-dvdsr 18641  df-unit 18642  df-invr 18672  df-drng 18749  df-lmod 18865  df-lss 18933  df-lsp 18972  df-lbs 19075  df-lvec 19103

This theorem is referenced by:  lbsextg  19162