isf32lem6 - Metamath Proof Explorer

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Theorem isf32lem6 10355

Description: Lemma for isfin3-2 10364. Each K value is nonempty. (Contributed by Stefan O'Rear, 5-Nov-2014.)

**Hypotheses**
Ref	Expression
isf32lem.a	⊢ (𝜑 → 𝐹:ω⟶𝒫 𝐺)
isf32lem.b	⊢ (𝜑 → ∀𝑥 ∈ ω (𝐹‘suc 𝑥) ⊆ (𝐹‘𝑥))
isf32lem.c	⊢ (𝜑 → ¬ ∩ ran 𝐹 ∈ ran 𝐹)
isf32lem.d	⊢ 𝑆 = {𝑦 ∈ ω ∣ (𝐹‘suc 𝑦) ⊊ (𝐹‘𝑦)}
isf32lem.e	⊢ 𝐽 = (𝑢 ∈ ω ↦ (℩𝑣 ∈ 𝑆 (𝑣 ∩ 𝑆) ≈ 𝑢))
isf32lem.f	⊢ 𝐾 = ((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤))) ∘ 𝐽)

**Assertion**
Ref	Expression
isf32lem6	⊢ ((𝜑 ∧ 𝐴 ∈ ω) → (𝐾‘𝐴) ≠ ∅)

Distinct variable groups: 𝑥,𝑤 𝑣,𝑢,𝑤,𝑥,𝑦,𝜑 𝑤,𝐴,𝑥,𝑦 𝑤,𝐹,𝑥,𝑦 𝑢,𝑆,𝑣,𝑤,𝑥,𝑦 𝑤,𝐽,𝑥,𝑦 𝑥,𝐾,𝑦 Allowed substitution hints: 𝐴(𝑣,𝑢) 𝐹(𝑣,𝑢) 𝐺(𝑥,𝑦,𝑤,𝑣,𝑢) 𝐽(𝑣,𝑢) 𝐾(𝑤,𝑣,𝑢)

**Proof of Theorem isf32lem6**
Step	Hyp	Ref	Expression
1		isf32lem.f	. . . 4 ⊢ 𝐾 = ((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤))) ∘ 𝐽)
2	1	fveq1i 6891	. . 3 ⊢ (𝐾‘𝐴) = (((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤))) ∘ 𝐽)‘𝐴)
3		isf32lem.d	. . . . . . . 8 ⊢ 𝑆 = {𝑦 ∈ ω ∣ (𝐹‘suc 𝑦) ⊊ (𝐹‘𝑦)}
4	3	ssrab3 4079	. . . . . . 7 ⊢ 𝑆 ⊆ ω
5		isf32lem.a	. . . . . . . 8 ⊢ (𝜑 → 𝐹:ω⟶𝒫 𝐺)
6		isf32lem.b	. . . . . . . 8 ⊢ (𝜑 → ∀𝑥 ∈ ω (𝐹‘suc 𝑥) ⊆ (𝐹‘𝑥))
7		isf32lem.c	. . . . . . . 8 ⊢ (𝜑 → ¬ ∩ ran 𝐹 ∈ ran 𝐹)
8	5, 6, 7, 3	isf32lem5 10354	. . . . . . 7 ⊢ (𝜑 → ¬ 𝑆 ∈ Fin)
9		isf32lem.e	. . . . . . . 8 ⊢ 𝐽 = (𝑢 ∈ ω ↦ (℩𝑣 ∈ 𝑆 (𝑣 ∩ 𝑆) ≈ 𝑢))
10	9	fin23lem22 10324	. . . . . . 7 ⊢ ((𝑆 ⊆ ω ∧ ¬ 𝑆 ∈ Fin) → 𝐽:ω–1-1-onto→𝑆)
11	4, 8, 10	sylancr 585	. . . . . 6 ⊢ (𝜑 → 𝐽:ω–1-1-onto→𝑆)
12		f1of 6832	. . . . . 6 ⊢ (𝐽:ω–1-1-onto→𝑆 → 𝐽:ω⟶𝑆)
13	11, 12	syl 17	. . . . 5 ⊢ (𝜑 → 𝐽:ω⟶𝑆)
14		fvco3 6989	. . . . 5 ⊢ ((𝐽:ω⟶𝑆 ∧ 𝐴 ∈ ω) → (((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤))) ∘ 𝐽)‘𝐴) = ((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤)))‘(𝐽‘𝐴)))
15	13, 14	sylan 578	. . . 4 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → (((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤))) ∘ 𝐽)‘𝐴) = ((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤)))‘(𝐽‘𝐴)))
16	8	adantr 479	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → ¬ 𝑆 ∈ Fin)
17	4, 16, 10	sylancr 585	. . . . . . 7 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → 𝐽:ω–1-1-onto→𝑆)
18	17, 12	syl 17	. . . . . 6 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → 𝐽:ω⟶𝑆)
19		ffvelcdm 7082	. . . . . 6 ⊢ ((𝐽:ω⟶𝑆 ∧ 𝐴 ∈ ω) → (𝐽‘𝐴) ∈ 𝑆)
20	18, 19	sylancom 586	. . . . 5 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → (𝐽‘𝐴) ∈ 𝑆)
21		fveq2 6890	. . . . . . 7 ⊢ (𝑤 = (𝐽‘𝐴) → (𝐹‘𝑤) = (𝐹‘(𝐽‘𝐴)))
22		suceq 6429	. . . . . . . 8 ⊢ (𝑤 = (𝐽‘𝐴) → suc 𝑤 = suc (𝐽‘𝐴))
23	22	fveq2d 6894	. . . . . . 7 ⊢ (𝑤 = (𝐽‘𝐴) → (𝐹‘suc 𝑤) = (𝐹‘suc (𝐽‘𝐴)))
24	21, 23	difeq12d 4122	. . . . . 6 ⊢ (𝑤 = (𝐽‘𝐴) → ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤)) = ((𝐹‘(𝐽‘𝐴)) ∖ (𝐹‘suc (𝐽‘𝐴))))
25		eqid 2730	. . . . . 6 ⊢ (𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤))) = (𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤)))
26		fvex 6903	. . . . . . 7 ⊢ (𝐹‘(𝐽‘𝐴)) ∈ V
27	26	difexi 5327	. . . . . 6 ⊢ ((𝐹‘(𝐽‘𝐴)) ∖ (𝐹‘suc (𝐽‘𝐴))) ∈ V
28	24, 25, 27	fvmpt 6997	. . . . 5 ⊢ ((𝐽‘𝐴) ∈ 𝑆 → ((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤)))‘(𝐽‘𝐴)) = ((𝐹‘(𝐽‘𝐴)) ∖ (𝐹‘suc (𝐽‘𝐴))))
29	20, 28	syl 17	. . . 4 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → ((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤)))‘(𝐽‘𝐴)) = ((𝐹‘(𝐽‘𝐴)) ∖ (𝐹‘suc (𝐽‘𝐴))))
30	15, 29	eqtrd 2770	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → (((𝑤 ∈ 𝑆 ↦ ((𝐹‘𝑤) ∖ (𝐹‘suc 𝑤))) ∘ 𝐽)‘𝐴) = ((𝐹‘(𝐽‘𝐴)) ∖ (𝐹‘suc (𝐽‘𝐴))))
31	2, 30	eqtrid 2782	. 2 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → (𝐾‘𝐴) = ((𝐹‘(𝐽‘𝐴)) ∖ (𝐹‘suc (𝐽‘𝐴))))
32		suceq 6429	. . . . . . . . 9 ⊢ (𝑦 = (𝐽‘𝐴) → suc 𝑦 = suc (𝐽‘𝐴))
33	32	fveq2d 6894	. . . . . . . 8 ⊢ (𝑦 = (𝐽‘𝐴) → (𝐹‘suc 𝑦) = (𝐹‘suc (𝐽‘𝐴)))
34		fveq2 6890	. . . . . . . 8 ⊢ (𝑦 = (𝐽‘𝐴) → (𝐹‘𝑦) = (𝐹‘(𝐽‘𝐴)))
35	33, 34	psseq12d 4093	. . . . . . 7 ⊢ (𝑦 = (𝐽‘𝐴) → ((𝐹‘suc 𝑦) ⊊ (𝐹‘𝑦) ↔ (𝐹‘suc (𝐽‘𝐴)) ⊊ (𝐹‘(𝐽‘𝐴))))
36	35, 3	elrab2 3685	. . . . . 6 ⊢ ((𝐽‘𝐴) ∈ 𝑆 ↔ ((𝐽‘𝐴) ∈ ω ∧ (𝐹‘suc (𝐽‘𝐴)) ⊊ (𝐹‘(𝐽‘𝐴))))
37	36	simprbi 495	. . . . 5 ⊢ ((𝐽‘𝐴) ∈ 𝑆 → (𝐹‘suc (𝐽‘𝐴)) ⊊ (𝐹‘(𝐽‘𝐴)))
38	20, 37	syl 17	. . . 4 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → (𝐹‘suc (𝐽‘𝐴)) ⊊ (𝐹‘(𝐽‘𝐴)))
39		df-pss 3966	. . . 4 ⊢ ((𝐹‘suc (𝐽‘𝐴)) ⊊ (𝐹‘(𝐽‘𝐴)) ↔ ((𝐹‘suc (𝐽‘𝐴)) ⊆ (𝐹‘(𝐽‘𝐴)) ∧ (𝐹‘suc (𝐽‘𝐴)) ≠ (𝐹‘(𝐽‘𝐴))))
40	38, 39	sylib 217	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → ((𝐹‘suc (𝐽‘𝐴)) ⊆ (𝐹‘(𝐽‘𝐴)) ∧ (𝐹‘suc (𝐽‘𝐴)) ≠ (𝐹‘(𝐽‘𝐴))))
41		pssdifn0 4364	. . 3 ⊢ (((𝐹‘suc (𝐽‘𝐴)) ⊆ (𝐹‘(𝐽‘𝐴)) ∧ (𝐹‘suc (𝐽‘𝐴)) ≠ (𝐹‘(𝐽‘𝐴))) → ((𝐹‘(𝐽‘𝐴)) ∖ (𝐹‘suc (𝐽‘𝐴))) ≠ ∅)
42	40, 41	syl 17	. 2 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → ((𝐹‘(𝐽‘𝐴)) ∖ (𝐹‘suc (𝐽‘𝐴))) ≠ ∅)
43	31, 42	eqnetrd 3006	1 ⊢ ((𝜑 ∧ 𝐴 ∈ ω) → (𝐾‘𝐴) ≠ ∅)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 394 = wceq 1539 ∈ wcel 2104 ≠ wne 2938 ∀wral 3059 {crab 3430 ∖ cdif 3944 ∩ cin 3946 ⊆ wss 3947 ⊊ wpss 3948 ∅c0 4321 𝒫 cpw 4601 ∩ cint 4949 class class class wbr 5147 ↦ cmpt 5230 ran crn 5676 ∘ ccom 5679 suc csuc 6365 ⟶wf 6538 –1-1-onto→wf1o 6541 ‘cfv 6542 ℩crio 7366 ωcom 7857 ≈ cen 8938 Fincfn 8941

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727

This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7367 df-ov 7414 df-om 7858 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-1o 8468 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-card 9936

This theorem is referenced by: isf32lem9 10358

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