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Theorem fin2so 34748
Description: Any totally ordered Tarski-finite set is finite; in particular, no amorphous set can be ordered. Theorem 2 of [Levy58]] p. 4. (Contributed by Brendan Leahy, 28-Jun-2019.)
Assertion
Ref Expression
fin2so ((𝐴 ∈ FinII𝑅 Or 𝐴) → 𝐴 ∈ Fin)

Proof of Theorem fin2so
Dummy variables 𝑣 𝑢 𝑤 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simplll 771 . . . . . . . . . . . 12 ((((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) ∧ 𝑥 ≠ ∅) → 𝐴 ∈ FinII)
2 ssrab2 4059 . . . . . . . . . . . . . . . . . . 19 {𝑤𝑥𝑤𝑅𝑣} ⊆ 𝑥
3 sstr 3978 . . . . . . . . . . . . . . . . . . 19 (({𝑤𝑥𝑤𝑅𝑣} ⊆ 𝑥𝑥𝐴) → {𝑤𝑥𝑤𝑅𝑣} ⊆ 𝐴)
42, 3mpan 686 . . . . . . . . . . . . . . . . . 18 (𝑥𝐴 → {𝑤𝑥𝑤𝑅𝑣} ⊆ 𝐴)
5 elpw2g 5243 . . . . . . . . . . . . . . . . . . 19 (𝐴 ∈ FinII → ({𝑤𝑥𝑤𝑅𝑣} ∈ 𝒫 𝐴 ↔ {𝑤𝑥𝑤𝑅𝑣} ⊆ 𝐴))
65biimpar 478 . . . . . . . . . . . . . . . . . 18 ((𝐴 ∈ FinII ∧ {𝑤𝑥𝑤𝑅𝑣} ⊆ 𝐴) → {𝑤𝑥𝑤𝑅𝑣} ∈ 𝒫 𝐴)
74, 6sylan2 592 . . . . . . . . . . . . . . . . 17 ((𝐴 ∈ FinII𝑥𝐴) → {𝑤𝑥𝑤𝑅𝑣} ∈ 𝒫 𝐴)
87ralrimivw 3187 . . . . . . . . . . . . . . . 16 ((𝐴 ∈ FinII𝑥𝐴) → ∀𝑣𝑥 {𝑤𝑥𝑤𝑅𝑣} ∈ 𝒫 𝐴)
9 vex 3502 . . . . . . . . . . . . . . . . . . 19 𝑥 ∈ V
109rabex 5231 . . . . . . . . . . . . . . . . . 18 {𝑤𝑥𝑤𝑅𝑣} ∈ V
1110rgenw 3154 . . . . . . . . . . . . . . . . 17 𝑣𝑥 {𝑤𝑥𝑤𝑅𝑣} ∈ V
12 eqid 2825 . . . . . . . . . . . . . . . . . 18 (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})
13 eleq1 2904 . . . . . . . . . . . . . . . . . 18 (𝑦 = {𝑤𝑥𝑤𝑅𝑣} → (𝑦 ∈ 𝒫 𝐴 ↔ {𝑤𝑥𝑤𝑅𝑣} ∈ 𝒫 𝐴))
1412, 13ralrnmpt 6857 . . . . . . . . . . . . . . . . 17 (∀𝑣𝑥 {𝑤𝑥𝑤𝑅𝑣} ∈ V → (∀𝑦 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})𝑦 ∈ 𝒫 𝐴 ↔ ∀𝑣𝑥 {𝑤𝑥𝑤𝑅𝑣} ∈ 𝒫 𝐴))
1511, 14ax-mp 5 . . . . . . . . . . . . . . . 16 (∀𝑦 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})𝑦 ∈ 𝒫 𝐴 ↔ ∀𝑣𝑥 {𝑤𝑥𝑤𝑅𝑣} ∈ 𝒫 𝐴)
168, 15sylibr 235 . . . . . . . . . . . . . . 15 ((𝐴 ∈ FinII𝑥𝐴) → ∀𝑦 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})𝑦 ∈ 𝒫 𝐴)
17 dfss3 3959 . . . . . . . . . . . . . . 15 (ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ⊆ 𝒫 𝐴 ↔ ∀𝑦 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})𝑦 ∈ 𝒫 𝐴)
1816, 17sylibr 235 . . . . . . . . . . . . . 14 ((𝐴 ∈ FinII𝑥𝐴) → ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ⊆ 𝒫 𝐴)
1918adantlr 711 . . . . . . . . . . . . 13 (((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) → ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ⊆ 𝒫 𝐴)
2019adantr 481 . . . . . . . . . . . 12 ((((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) ∧ 𝑥 ≠ ∅) → ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ⊆ 𝒫 𝐴)
2110, 12dmmpti 6488 . . . . . . . . . . . . . . 15 dom (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = 𝑥
2221neeq1i 3084 . . . . . . . . . . . . . 14 (dom (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ≠ ∅ ↔ 𝑥 ≠ ∅)
23 dm0rn0 5793 . . . . . . . . . . . . . . 15 (dom (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = ∅ ↔ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = ∅)
2423necon3bii 3072 . . . . . . . . . . . . . 14 (dom (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ≠ ∅ ↔ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ≠ ∅)
2522, 24sylbb1 238 . . . . . . . . . . . . 13 (𝑥 ≠ ∅ → ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ≠ ∅)
2625adantl 482 . . . . . . . . . . . 12 ((((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) ∧ 𝑥 ≠ ∅) → ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ≠ ∅)
27 soss 5491 . . . . . . . . . . . . . . . 16 (𝑥𝐴 → (𝑅 Or 𝐴𝑅 Or 𝑥))
2827impcom 408 . . . . . . . . . . . . . . 15 ((𝑅 Or 𝐴𝑥𝐴) → 𝑅 Or 𝑥)
29 porpss 7446 . . . . . . . . . . . . . . . . 17 [] Po ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})
3029a1i 11 . . . . . . . . . . . . . . . 16 (𝑅 Or 𝑥 → [] Po ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}))
31 solin 5496 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑅 Or 𝑥 ∧ (𝑣𝑥𝑦𝑥)) → (𝑣𝑅𝑦𝑣 = 𝑦𝑦𝑅𝑣))
32 fin2solem 34747 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑅 Or 𝑥 ∧ (𝑣𝑥𝑦𝑥)) → (𝑣𝑅𝑦 → {𝑤𝑥𝑤𝑅𝑣} [] {𝑤𝑥𝑤𝑅𝑦}))
33 breq2 5066 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑣 = 𝑦 → (𝑤𝑅𝑣𝑤𝑅𝑦))
3433rabbidv 3485 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑣 = 𝑦 → {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦})
3534a1i 11 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑅 Or 𝑥 ∧ (𝑣𝑥𝑦𝑥)) → (𝑣 = 𝑦 → {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦}))
36 fin2solem 34747 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝑅 Or 𝑥 ∧ (𝑦𝑥𝑣𝑥)) → (𝑦𝑅𝑣 → {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣}))
3736ancom2s 646 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑅 Or 𝑥 ∧ (𝑣𝑥𝑦𝑥)) → (𝑦𝑅𝑣 → {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣}))
3832, 35, 373orim123d 1437 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑅 Or 𝑥 ∧ (𝑣𝑥𝑦𝑥)) → ((𝑣𝑅𝑦𝑣 = 𝑦𝑦𝑅𝑣) → ({𝑤𝑥𝑤𝑅𝑣} [] {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣})))
3931, 38mpd 15 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑅 Or 𝑥 ∧ (𝑣𝑥𝑦𝑥)) → ({𝑤𝑥𝑤𝑅𝑣} [] {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣}))
4039ralrimivva 3195 . . . . . . . . . . . . . . . . . . . . 21 (𝑅 Or 𝑥 → ∀𝑣𝑥𝑦𝑥 ({𝑤𝑥𝑤𝑅𝑣} [] {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣}))
41 breq1 5065 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑢 = {𝑤𝑥𝑤𝑅𝑣} → (𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ↔ {𝑤𝑥𝑤𝑅𝑣} [] {𝑤𝑥𝑤𝑅𝑦}))
42 eqeq1 2829 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑢 = {𝑤𝑥𝑤𝑅𝑣} → (𝑢 = {𝑤𝑥𝑤𝑅𝑦} ↔ {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦}))
43 breq2 5066 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑢 = {𝑤𝑥𝑤𝑅𝑣} → ({𝑤𝑥𝑤𝑅𝑦} [] 𝑢 ↔ {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣}))
4441, 42, 433orbi123d 1428 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑢 = {𝑤𝑥𝑤𝑅𝑣} → ((𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ∨ 𝑢 = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢) ↔ ({𝑤𝑥𝑤𝑅𝑣} [] {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣})))
4544ralbidv 3201 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑢 = {𝑤𝑥𝑤𝑅𝑣} → (∀𝑦𝑥 (𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ∨ 𝑢 = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢) ↔ ∀𝑦𝑥 ({𝑤𝑥𝑤𝑅𝑣} [] {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣})))
4612, 45ralrnmpt 6857 . . . . . . . . . . . . . . . . . . . . . 22 (∀𝑣𝑥 {𝑤𝑥𝑤𝑅𝑣} ∈ V → (∀𝑢 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})∀𝑦𝑥 (𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ∨ 𝑢 = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢) ↔ ∀𝑣𝑥𝑦𝑥 ({𝑤𝑥𝑤𝑅𝑣} [] {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣})))
4711, 46ax-mp 5 . . . . . . . . . . . . . . . . . . . . 21 (∀𝑢 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})∀𝑦𝑥 (𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ∨ 𝑢 = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢) ↔ ∀𝑣𝑥𝑦𝑥 ({𝑤𝑥𝑤𝑅𝑣} [] {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] {𝑤𝑥𝑤𝑅𝑣}))
4840, 47sylibr 235 . . . . . . . . . . . . . . . . . . . 20 (𝑅 Or 𝑥 → ∀𝑢 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})∀𝑦𝑥 (𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ∨ 𝑢 = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢))
4948r19.21bi 3212 . . . . . . . . . . . . . . . . . . 19 ((𝑅 Or 𝑥𝑢 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})) → ∀𝑦𝑥 (𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ∨ 𝑢 = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢))
509rabex 5231 . . . . . . . . . . . . . . . . . . . . 21 {𝑤𝑥𝑤𝑅𝑦} ∈ V
5150rgenw 3154 . . . . . . . . . . . . . . . . . . . 20 𝑦𝑥 {𝑤𝑥𝑤𝑅𝑦} ∈ V
5234cbvmptv 5165 . . . . . . . . . . . . . . . . . . . . 21 (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = (𝑦𝑥 ↦ {𝑤𝑥𝑤𝑅𝑦})
53 breq2 5066 . . . . . . . . . . . . . . . . . . . . . 22 (𝑧 = {𝑤𝑥𝑤𝑅𝑦} → (𝑢 [] 𝑧𝑢 [] {𝑤𝑥𝑤𝑅𝑦}))
54 eqeq2 2837 . . . . . . . . . . . . . . . . . . . . . 22 (𝑧 = {𝑤𝑥𝑤𝑅𝑦} → (𝑢 = 𝑧𝑢 = {𝑤𝑥𝑤𝑅𝑦}))
55 breq1 5065 . . . . . . . . . . . . . . . . . . . . . 22 (𝑧 = {𝑤𝑥𝑤𝑅𝑦} → (𝑧 [] 𝑢 ↔ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢))
5653, 54, 553orbi123d 1428 . . . . . . . . . . . . . . . . . . . . 21 (𝑧 = {𝑤𝑥𝑤𝑅𝑦} → ((𝑢 [] 𝑧𝑢 = 𝑧𝑧 [] 𝑢) ↔ (𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ∨ 𝑢 = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢)))
5752, 56ralrnmpt 6857 . . . . . . . . . . . . . . . . . . . 20 (∀𝑦𝑥 {𝑤𝑥𝑤𝑅𝑦} ∈ V → (∀𝑧 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})(𝑢 [] 𝑧𝑢 = 𝑧𝑧 [] 𝑢) ↔ ∀𝑦𝑥 (𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ∨ 𝑢 = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢)))
5851, 57ax-mp 5 . . . . . . . . . . . . . . . . . . 19 (∀𝑧 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})(𝑢 [] 𝑧𝑢 = 𝑧𝑧 [] 𝑢) ↔ ∀𝑦𝑥 (𝑢 [] {𝑤𝑥𝑤𝑅𝑦} ∨ 𝑢 = {𝑤𝑥𝑤𝑅𝑦} ∨ {𝑤𝑥𝑤𝑅𝑦} [] 𝑢))
5949, 58sylibr 235 . . . . . . . . . . . . . . . . . 18 ((𝑅 Or 𝑥𝑢 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})) → ∀𝑧 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})(𝑢 [] 𝑧𝑢 = 𝑧𝑧 [] 𝑢))
6059r19.21bi 3212 . . . . . . . . . . . . . . . . 17 (((𝑅 Or 𝑥𝑢 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})) ∧ 𝑧 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})) → (𝑢 [] 𝑧𝑢 = 𝑧𝑧 [] 𝑢))
6160anasss 467 . . . . . . . . . . . . . . . 16 ((𝑅 Or 𝑥 ∧ (𝑢 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ∧ 𝑧 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}))) → (𝑢 [] 𝑧𝑢 = 𝑧𝑧 [] 𝑢))
6230, 61issod 5504 . . . . . . . . . . . . . . 15 (𝑅 Or 𝑥 → [] Or ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}))
6328, 62syl 17 . . . . . . . . . . . . . 14 ((𝑅 Or 𝐴𝑥𝐴) → [] Or ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}))
6463adantll 710 . . . . . . . . . . . . 13 (((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) → [] Or ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}))
6564adantr 481 . . . . . . . . . . . 12 ((((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) ∧ 𝑥 ≠ ∅) → [] Or ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}))
66 fin2i2 9732 . . . . . . . . . . . 12 (((𝐴 ∈ FinII ∧ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ⊆ 𝒫 𝐴) ∧ (ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ≠ ∅ ∧ [] Or ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}))) → ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}))
671, 20, 26, 65, 66syl22anc 836 . . . . . . . . . . 11 ((((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) ∧ 𝑥 ≠ ∅) → ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}))
6852, 50elrnmpti 5830 . . . . . . . . . . 11 ( ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ↔ ∃𝑦𝑥 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦})
6967, 68sylib 219 . . . . . . . . . 10 ((((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) ∧ 𝑥 ≠ ∅) → ∃𝑦𝑥 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦})
70 ssel2 3965 . . . . . . . . . . . . . . . . . . . 20 ((𝑥𝐴𝑧𝑥) → 𝑧𝐴)
71 sonr 5494 . . . . . . . . . . . . . . . . . . . 20 ((𝑅 Or 𝐴𝑧𝐴) → ¬ 𝑧𝑅𝑧)
7270, 71sylan2 592 . . . . . . . . . . . . . . . . . . 19 ((𝑅 Or 𝐴 ∧ (𝑥𝐴𝑧𝑥)) → ¬ 𝑧𝑅𝑧)
7372anassrs 468 . . . . . . . . . . . . . . . . . 18 (((𝑅 Or 𝐴𝑥𝐴) ∧ 𝑧𝑥) → ¬ 𝑧𝑅𝑧)
7473adantlr 711 . . . . . . . . . . . . . . . . 17 ((((𝑅 Or 𝐴𝑥𝐴) ∧ 𝑦𝑥) ∧ 𝑧𝑥) → ¬ 𝑧𝑅𝑧)
7574adantr 481 . . . . . . . . . . . . . . . 16 (((((𝑅 Or 𝐴𝑥𝐴) ∧ 𝑦𝑥) ∧ 𝑧𝑥) ∧ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦}) → ¬ 𝑧𝑅𝑧)
76 breq1 5065 . . . . . . . . . . . . . . . . . . . . 21 (𝑤 = 𝑧 → (𝑤𝑅𝑦𝑧𝑅𝑦))
7776elrab 3683 . . . . . . . . . . . . . . . . . . . 20 (𝑧 ∈ {𝑤𝑥𝑤𝑅𝑦} ↔ (𝑧𝑥𝑧𝑅𝑦))
7877simplbi2 501 . . . . . . . . . . . . . . . . . . 19 (𝑧𝑥 → (𝑧𝑅𝑦𝑧 ∈ {𝑤𝑥𝑤𝑅𝑦}))
7978ad2antlr 723 . . . . . . . . . . . . . . . . . 18 (((𝑦𝑥𝑧𝑥) ∧ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦}) → (𝑧𝑅𝑦𝑧 ∈ {𝑤𝑥𝑤𝑅𝑦}))
80 vex 3502 . . . . . . . . . . . . . . . . . . . . . . 23 𝑧 ∈ V
8180elint2 4880 . . . . . . . . . . . . . . . . . . . . . 22 (𝑧 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ↔ ∀𝑦 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})𝑧𝑦)
82 eleq2 2905 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑦 = {𝑤𝑥𝑤𝑅𝑣} → (𝑧𝑦𝑧 ∈ {𝑤𝑥𝑤𝑅𝑣}))
8312, 82ralrnmpt 6857 . . . . . . . . . . . . . . . . . . . . . . 23 (∀𝑣𝑥 {𝑤𝑥𝑤𝑅𝑣} ∈ V → (∀𝑦 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})𝑧𝑦 ↔ ∀𝑣𝑥 𝑧 ∈ {𝑤𝑥𝑤𝑅𝑣}))
8411, 83ax-mp 5 . . . . . . . . . . . . . . . . . . . . . 22 (∀𝑦 ∈ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣})𝑧𝑦 ↔ ∀𝑣𝑥 𝑧 ∈ {𝑤𝑥𝑤𝑅𝑣})
8581, 84bitri 276 . . . . . . . . . . . . . . . . . . . . 21 (𝑧 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ↔ ∀𝑣𝑥 𝑧 ∈ {𝑤𝑥𝑤𝑅𝑣})
86 breq2 5066 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑣 = 𝑧 → (𝑤𝑅𝑣𝑤𝑅𝑧))
8786rabbidv 3485 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑣 = 𝑧 → {𝑤𝑥𝑤𝑅𝑣} = {𝑤𝑥𝑤𝑅𝑧})
8887eleq2d 2902 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑣 = 𝑧 → (𝑧 ∈ {𝑤𝑥𝑤𝑅𝑣} ↔ 𝑧 ∈ {𝑤𝑥𝑤𝑅𝑧}))
8988rspcv 3621 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑧𝑥 → (∀𝑣𝑥 𝑧 ∈ {𝑤𝑥𝑤𝑅𝑣} → 𝑧 ∈ {𝑤𝑥𝑤𝑅𝑧}))
90 breq1 5065 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑤 = 𝑧 → (𝑤𝑅𝑧𝑧𝑅𝑧))
9190elrab 3683 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑧 ∈ {𝑤𝑥𝑤𝑅𝑧} ↔ (𝑧𝑥𝑧𝑅𝑧))
9291simprbi 497 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑧 ∈ {𝑤𝑥𝑤𝑅𝑧} → 𝑧𝑅𝑧)
9389, 92syl6 35 . . . . . . . . . . . . . . . . . . . . . 22 (𝑧𝑥 → (∀𝑣𝑥 𝑧 ∈ {𝑤𝑥𝑤𝑅𝑣} → 𝑧𝑅𝑧))
9493adantl 482 . . . . . . . . . . . . . . . . . . . . 21 ((𝑦𝑥𝑧𝑥) → (∀𝑣𝑥 𝑧 ∈ {𝑤𝑥𝑤𝑅𝑣} → 𝑧𝑅𝑧))
9585, 94syl5bi 243 . . . . . . . . . . . . . . . . . . . 20 ((𝑦𝑥𝑧𝑥) → (𝑧 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) → 𝑧𝑅𝑧))
96 eleq2 2905 . . . . . . . . . . . . . . . . . . . . 21 ( ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦} → (𝑧 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) ↔ 𝑧 ∈ {𝑤𝑥𝑤𝑅𝑦}))
9796imbi1d 343 . . . . . . . . . . . . . . . . . . . 20 ( ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦} → ((𝑧 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) → 𝑧𝑅𝑧) ↔ (𝑧 ∈ {𝑤𝑥𝑤𝑅𝑦} → 𝑧𝑅𝑧)))
9895, 97syl5ibcom 246 . . . . . . . . . . . . . . . . . . 19 ((𝑦𝑥𝑧𝑥) → ( ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦} → (𝑧 ∈ {𝑤𝑥𝑤𝑅𝑦} → 𝑧𝑅𝑧)))
9998imp 407 . . . . . . . . . . . . . . . . . 18 (((𝑦𝑥𝑧𝑥) ∧ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦}) → (𝑧 ∈ {𝑤𝑥𝑤𝑅𝑦} → 𝑧𝑅𝑧))
10079, 99syld 47 . . . . . . . . . . . . . . . . 17 (((𝑦𝑥𝑧𝑥) ∧ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦}) → (𝑧𝑅𝑦𝑧𝑅𝑧))
101100adantlll 714 . . . . . . . . . . . . . . . 16 (((((𝑅 Or 𝐴𝑥𝐴) ∧ 𝑦𝑥) ∧ 𝑧𝑥) ∧ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦}) → (𝑧𝑅𝑦𝑧𝑅𝑧))
10275, 101mtod 199 . . . . . . . . . . . . . . 15 (((((𝑅 Or 𝐴𝑥𝐴) ∧ 𝑦𝑥) ∧ 𝑧𝑥) ∧ ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦}) → ¬ 𝑧𝑅𝑦)
103102ex 413 . . . . . . . . . . . . . 14 ((((𝑅 Or 𝐴𝑥𝐴) ∧ 𝑦𝑥) ∧ 𝑧𝑥) → ( ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦} → ¬ 𝑧𝑅𝑦))
104103ralrimdva 3193 . . . . . . . . . . . . 13 (((𝑅 Or 𝐴𝑥𝐴) ∧ 𝑦𝑥) → ( ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦} → ∀𝑧𝑥 ¬ 𝑧𝑅𝑦))
105104reximdva 3278 . . . . . . . . . . . 12 ((𝑅 Or 𝐴𝑥𝐴) → (∃𝑦𝑥 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦} → ∃𝑦𝑥𝑧𝑥 ¬ 𝑧𝑅𝑦))
106105adantll 710 . . . . . . . . . . 11 (((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) → (∃𝑦𝑥 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦} → ∃𝑦𝑥𝑧𝑥 ¬ 𝑧𝑅𝑦))
107106adantr 481 . . . . . . . . . 10 ((((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) ∧ 𝑥 ≠ ∅) → (∃𝑦𝑥 ran (𝑣𝑥 ↦ {𝑤𝑥𝑤𝑅𝑣}) = {𝑤𝑥𝑤𝑅𝑦} → ∃𝑦𝑥𝑧𝑥 ¬ 𝑧𝑅𝑦))
10869, 107mpd 15 . . . . . . . . 9 ((((𝐴 ∈ FinII𝑅 Or 𝐴) ∧ 𝑥𝐴) ∧ 𝑥 ≠ ∅) → ∃𝑦𝑥𝑧𝑥 ¬ 𝑧𝑅𝑦)
109108expl 458 . . . . . . . 8 ((𝐴 ∈ FinII𝑅 Or 𝐴) → ((𝑥𝐴𝑥 ≠ ∅) → ∃𝑦𝑥𝑧𝑥 ¬ 𝑧𝑅𝑦))
110109alrimiv 1921 . . . . . . 7 ((𝐴 ∈ FinII𝑅 Or 𝐴) → ∀𝑥((𝑥𝐴𝑥 ≠ ∅) → ∃𝑦𝑥𝑧𝑥 ¬ 𝑧𝑅𝑦))
111 df-fr 5512 . . . . . . 7 (𝑅 Fr 𝐴 ↔ ∀𝑥((𝑥𝐴𝑥 ≠ ∅) → ∃𝑦𝑥𝑧𝑥 ¬ 𝑧𝑅𝑦))
112110, 111sylibr 235 . . . . . 6 ((𝐴 ∈ FinII𝑅 Or 𝐴) → 𝑅 Fr 𝐴)
113 simpr 485 . . . . . 6 ((𝐴 ∈ FinII𝑅 Or 𝐴) → 𝑅 Or 𝐴)
114 df-we 5514 . . . . . 6 (𝑅 We 𝐴 ↔ (𝑅 Fr 𝐴𝑅 Or 𝐴))
115112, 113, 114sylanbrc 583 . . . . 5 ((𝐴 ∈ FinII𝑅 Or 𝐴) → 𝑅 We 𝐴)
116 weinxp 5634 . . . . 5 (𝑅 We 𝐴 ↔ (𝑅 ∩ (𝐴 × 𝐴)) We 𝐴)
117115, 116sylib 219 . . . 4 ((𝐴 ∈ FinII𝑅 Or 𝐴) → (𝑅 ∩ (𝐴 × 𝐴)) We 𝐴)
118 sqxpexg 7469 . . . . . 6 (𝐴 ∈ FinII → (𝐴 × 𝐴) ∈ V)
119 incom 4181 . . . . . . 7 (𝑅 ∩ (𝐴 × 𝐴)) = ((𝐴 × 𝐴) ∩ 𝑅)
120 inex1g 5219 . . . . . . 7 ((𝐴 × 𝐴) ∈ V → ((𝐴 × 𝐴) ∩ 𝑅) ∈ V)
121119, 120eqeltrid 2921 . . . . . 6 ((𝐴 × 𝐴) ∈ V → (𝑅 ∩ (𝐴 × 𝐴)) ∈ V)
122 weeq1 5541 . . . . . . 7 (𝑧 = (𝑅 ∩ (𝐴 × 𝐴)) → (𝑧 We 𝐴 ↔ (𝑅 ∩ (𝐴 × 𝐴)) We 𝐴))
123122spcegv 3601 . . . . . 6 ((𝑅 ∩ (𝐴 × 𝐴)) ∈ V → ((𝑅 ∩ (𝐴 × 𝐴)) We 𝐴 → ∃𝑧 𝑧 We 𝐴))
124118, 121, 1233syl 18 . . . . 5 (𝐴 ∈ FinII → ((𝑅 ∩ (𝐴 × 𝐴)) We 𝐴 → ∃𝑧 𝑧 We 𝐴))
125124imp 407 . . . 4 ((𝐴 ∈ FinII ∧ (𝑅 ∩ (𝐴 × 𝐴)) We 𝐴) → ∃𝑧 𝑧 We 𝐴)
126117, 125syldan 591 . . 3 ((𝐴 ∈ FinII𝑅 Or 𝐴) → ∃𝑧 𝑧 We 𝐴)
127 ween 9453 . . 3 (𝐴 ∈ dom card ↔ ∃𝑧 𝑧 We 𝐴)
128126, 127sylibr 235 . 2 ((𝐴 ∈ FinII𝑅 Or 𝐴) → 𝐴 ∈ dom card)
129 fin23 9803 . . . . 5 (𝐴 ∈ FinII𝐴 ∈ FinIII)
130 fin34 9804 . . . . 5 (𝐴 ∈ FinIII𝐴 ∈ FinIV)
131 fin45 9806 . . . . 5 (𝐴 ∈ FinIV𝐴 ∈ FinV)
132129, 130, 1313syl 18 . . . 4 (𝐴 ∈ FinII𝐴 ∈ FinV)
133 fin56 9807 . . . 4 (𝐴 ∈ FinV𝐴 ∈ FinVI)
134 fin67 9809 . . . 4 (𝐴 ∈ FinVI𝐴 ∈ FinVII)
135132, 133, 1343syl 18 . . 3 (𝐴 ∈ FinII𝐴 ∈ FinVII)
136 fin71num 9811 . . . 4 (𝐴 ∈ dom card → (𝐴 ∈ FinVII𝐴 ∈ Fin))
137136biimpac 479 . . 3 ((𝐴 ∈ FinVII𝐴 ∈ dom card) → 𝐴 ∈ Fin)
138135, 137sylan 580 . 2 ((𝐴 ∈ FinII𝐴 ∈ dom card) → 𝐴 ∈ Fin)
139128, 138syldan 591 1 ((𝐴 ∈ FinII𝑅 Or 𝐴) → 𝐴 ∈ Fin)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 207  wa 396  w3o 1080  wal 1528   = wceq 1530  wex 1773  wcel 2107  wne 3020  wral 3142  wrex 3143  {crab 3146  Vcvv 3499  cin 3938  wss 3939  c0 4294  𝒫 cpw 4541   cint 4873   class class class wbr 5062  cmpt 5142   Po wpo 5470   Or wor 5471   Fr wfr 5509   We wwe 5511   × cxp 5551  dom cdm 5553  ran crn 5554   [] crpss 7441  Fincfn 8501  cardccrd 9356  FinIIcfin2 9693  FinIVcfin4 9694  FinIIIcfin3 9695  FinVcfin5 9696  FinVIcfin6 9697  FinVIIcfin7 9698
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-13 2385  ax-ext 2797  ax-rep 5186  ax-sep 5199  ax-nul 5206  ax-pow 5262  ax-pr 5325  ax-un 7454  ax-inf2 9096
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2619  df-eu 2651  df-clab 2804  df-cleq 2818  df-clel 2897  df-nfc 2967  df-ne 3021  df-ral 3147  df-rex 3148  df-reu 3149  df-rmo 3150  df-rab 3151  df-v 3501  df-sbc 3776  df-csb 3887  df-dif 3942  df-un 3944  df-in 3946  df-ss 3955  df-pss 3957  df-nul 4295  df-if 4470  df-pw 4543  df-sn 4564  df-pr 4566  df-tp 4568  df-op 4570  df-uni 4837  df-int 4874  df-iun 4918  df-br 5063  df-opab 5125  df-mpt 5143  df-tr 5169  df-id 5458  df-eprel 5463  df-po 5472  df-so 5473  df-fr 5512  df-se 5513  df-we 5514  df-xp 5559  df-rel 5560  df-cnv 5561  df-co 5562  df-dm 5563  df-rn 5564  df-res 5565  df-ima 5566  df-pred 6145  df-ord 6191  df-on 6192  df-lim 6193  df-suc 6194  df-iota 6311  df-fun 6353  df-fn 6354  df-f 6355  df-f1 6356  df-fo 6357  df-f1o 6358  df-fv 6359  df-isom 6360  df-riota 7109  df-ov 7154  df-oprab 7155  df-mpo 7156  df-rpss 7442  df-om 7572  df-1st 7683  df-2nd 7684  df-wrecs 7941  df-recs 8002  df-rdg 8040  df-seqom 8078  df-1o 8096  df-2o 8097  df-oadd 8100  df-er 8282  df-map 8401  df-en 8502  df-dom 8503  df-sdom 8504  df-fin 8505  df-oi 8966  df-wdom 9015  df-dju 9322  df-card 9360  df-fin2 9700  df-fin4 9701  df-fin3 9702  df-fin5 9703  df-fin6 9704  df-fin7 9705
This theorem is referenced by: (None)
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