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Theorem cfpwsdom 9608
Description: A corollary of Konig's Theorem konigth 9593. Theorem 11.29 of [TakeutiZaring] p. 108. (Contributed by Mario Carneiro, 20-Mar-2013.)
Hypothesis
Ref Expression
cfpwsdom.1 𝐵 ∈ V
Assertion
Ref Expression
cfpwsdom (2𝑜𝐵 → (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))

Proof of Theorem cfpwsdom
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ovex 6823 . . . . . . . . 9 (𝐵𝑚 (ℵ‘𝐴)) ∈ V
21cardid 9571 . . . . . . . 8 (card‘(𝐵𝑚 (ℵ‘𝐴))) ≈ (𝐵𝑚 (ℵ‘𝐴))
32ensymi 8159 . . . . . . 7 (𝐵𝑚 (ℵ‘𝐴)) ≈ (card‘(𝐵𝑚 (ℵ‘𝐴)))
4 fvex 6342 . . . . . . . . . . . . . 14 (ℵ‘𝐴) ∈ V
54canth2 8269 . . . . . . . . . . . . 13 (ℵ‘𝐴) ≺ 𝒫 (ℵ‘𝐴)
64pw2en 8223 . . . . . . . . . . . . 13 𝒫 (ℵ‘𝐴) ≈ (2𝑜𝑚 (ℵ‘𝐴))
7 sdomentr 8250 . . . . . . . . . . . . 13 (((ℵ‘𝐴) ≺ 𝒫 (ℵ‘𝐴) ∧ 𝒫 (ℵ‘𝐴) ≈ (2𝑜𝑚 (ℵ‘𝐴))) → (ℵ‘𝐴) ≺ (2𝑜𝑚 (ℵ‘𝐴)))
85, 6, 7mp2an 672 . . . . . . . . . . . 12 (ℵ‘𝐴) ≺ (2𝑜𝑚 (ℵ‘𝐴))
9 mapdom1 8281 . . . . . . . . . . . 12 (2𝑜𝐵 → (2𝑜𝑚 (ℵ‘𝐴)) ≼ (𝐵𝑚 (ℵ‘𝐴)))
10 sdomdomtr 8249 . . . . . . . . . . . 12 (((ℵ‘𝐴) ≺ (2𝑜𝑚 (ℵ‘𝐴)) ∧ (2𝑜𝑚 (ℵ‘𝐴)) ≼ (𝐵𝑚 (ℵ‘𝐴))) → (ℵ‘𝐴) ≺ (𝐵𝑚 (ℵ‘𝐴)))
118, 9, 10sylancr 575 . . . . . . . . . . 11 (2𝑜𝐵 → (ℵ‘𝐴) ≺ (𝐵𝑚 (ℵ‘𝐴)))
12 ficard 9589 . . . . . . . . . . . . . . . . 17 ((𝐵𝑚 (ℵ‘𝐴)) ∈ V → ((𝐵𝑚 (ℵ‘𝐴)) ∈ Fin ↔ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω))
131, 12ax-mp 5 . . . . . . . . . . . . . . . 16 ((𝐵𝑚 (ℵ‘𝐴)) ∈ Fin ↔ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω)
14 isfinite 8713 . . . . . . . . . . . . . . . . 17 ((𝐵𝑚 (ℵ‘𝐴)) ∈ Fin ↔ (𝐵𝑚 (ℵ‘𝐴)) ≺ ω)
15 sdomdom 8137 . . . . . . . . . . . . . . . . 17 ((𝐵𝑚 (ℵ‘𝐴)) ≺ ω → (𝐵𝑚 (ℵ‘𝐴)) ≼ ω)
1614, 15sylbi 207 . . . . . . . . . . . . . . . 16 ((𝐵𝑚 (ℵ‘𝐴)) ∈ Fin → (𝐵𝑚 (ℵ‘𝐴)) ≼ ω)
1713, 16sylbir 225 . . . . . . . . . . . . . . 15 ((card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω → (𝐵𝑚 (ℵ‘𝐴)) ≼ ω)
18 alephgeom 9105 . . . . . . . . . . . . . . . 16 (𝐴 ∈ On ↔ ω ⊆ (ℵ‘𝐴))
19 alephon 9092 . . . . . . . . . . . . . . . . 17 (ℵ‘𝐴) ∈ On
20 ssdomg 8155 . . . . . . . . . . . . . . . . 17 ((ℵ‘𝐴) ∈ On → (ω ⊆ (ℵ‘𝐴) → ω ≼ (ℵ‘𝐴)))
2119, 20ax-mp 5 . . . . . . . . . . . . . . . 16 (ω ⊆ (ℵ‘𝐴) → ω ≼ (ℵ‘𝐴))
2218, 21sylbi 207 . . . . . . . . . . . . . . 15 (𝐴 ∈ On → ω ≼ (ℵ‘𝐴))
23 domtr 8162 . . . . . . . . . . . . . . 15 (((𝐵𝑚 (ℵ‘𝐴)) ≼ ω ∧ ω ≼ (ℵ‘𝐴)) → (𝐵𝑚 (ℵ‘𝐴)) ≼ (ℵ‘𝐴))
2417, 22, 23syl2an 583 . . . . . . . . . . . . . 14 (((card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω ∧ 𝐴 ∈ On) → (𝐵𝑚 (ℵ‘𝐴)) ≼ (ℵ‘𝐴))
25 domnsym 8242 . . . . . . . . . . . . . 14 ((𝐵𝑚 (ℵ‘𝐴)) ≼ (ℵ‘𝐴) → ¬ (ℵ‘𝐴) ≺ (𝐵𝑚 (ℵ‘𝐴)))
2624, 25syl 17 . . . . . . . . . . . . 13 (((card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω ∧ 𝐴 ∈ On) → ¬ (ℵ‘𝐴) ≺ (𝐵𝑚 (ℵ‘𝐴)))
2726expcom 398 . . . . . . . . . . . 12 (𝐴 ∈ On → ((card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω → ¬ (ℵ‘𝐴) ≺ (𝐵𝑚 (ℵ‘𝐴))))
2827con2d 131 . . . . . . . . . . 11 (𝐴 ∈ On → ((ℵ‘𝐴) ≺ (𝐵𝑚 (ℵ‘𝐴)) → ¬ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω))
29 cardidm 8985 . . . . . . . . . . . 12 (card‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) = (card‘(𝐵𝑚 (ℵ‘𝐴)))
30 iscard3 9116 . . . . . . . . . . . . 13 ((card‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) = (card‘(𝐵𝑚 (ℵ‘𝐴))) ↔ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ (ω ∪ ran ℵ))
31 elun 3904 . . . . . . . . . . . . 13 ((card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ (ω ∪ ran ℵ) ↔ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω ∨ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ran ℵ))
32 df-or 837 . . . . . . . . . . . . 13 (((card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω ∨ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ran ℵ) ↔ (¬ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω → (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ran ℵ))
3330, 31, 323bitri 286 . . . . . . . . . . . 12 ((card‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) = (card‘(𝐵𝑚 (ℵ‘𝐴))) ↔ (¬ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω → (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ran ℵ))
3429, 33mpbi 220 . . . . . . . . . . 11 (¬ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ω → (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ran ℵ)
3511, 28, 34syl56 36 . . . . . . . . . 10 (𝐴 ∈ On → (2𝑜𝐵 → (card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ran ℵ))
36 alephfnon 9088 . . . . . . . . . . 11 ℵ Fn On
37 fvelrnb 6385 . . . . . . . . . . 11 (ℵ Fn On → ((card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ran ℵ ↔ ∃𝑥 ∈ On (ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴)))))
3836, 37ax-mp 5 . . . . . . . . . 10 ((card‘(𝐵𝑚 (ℵ‘𝐴))) ∈ ran ℵ ↔ ∃𝑥 ∈ On (ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴))))
3935, 38syl6ib 241 . . . . . . . . 9 (𝐴 ∈ On → (2𝑜𝐵 → ∃𝑥 ∈ On (ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴)))))
40 eqid 2771 . . . . . . . . . . . 12 (𝑦 ∈ (cf‘(ℵ‘𝑥)) ↦ (har‘(𝑧𝑦))) = (𝑦 ∈ (cf‘(ℵ‘𝑥)) ↦ (har‘(𝑧𝑦)))
4140pwcfsdom 9607 . . . . . . . . . . 11 (ℵ‘𝑥) ≺ ((ℵ‘𝑥) ↑𝑚 (cf‘(ℵ‘𝑥)))
42 id 22 . . . . . . . . . . . 12 ((ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴))) → (ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴))))
43 fveq2 6332 . . . . . . . . . . . . 13 ((ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴))) → (cf‘(ℵ‘𝑥)) = (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))
4442, 43oveq12d 6811 . . . . . . . . . . . 12 ((ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴))) → ((ℵ‘𝑥) ↑𝑚 (cf‘(ℵ‘𝑥))) = ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
4542, 44breq12d 4799 . . . . . . . . . . 11 ((ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴))) → ((ℵ‘𝑥) ≺ ((ℵ‘𝑥) ↑𝑚 (cf‘(ℵ‘𝑥))) ↔ (card‘(𝐵𝑚 (ℵ‘𝐴))) ≺ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))))
4641, 45mpbii 223 . . . . . . . . . 10 ((ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴))) → (card‘(𝐵𝑚 (ℵ‘𝐴))) ≺ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
4746rexlimivw 3177 . . . . . . . . 9 (∃𝑥 ∈ On (ℵ‘𝑥) = (card‘(𝐵𝑚 (ℵ‘𝐴))) → (card‘(𝐵𝑚 (ℵ‘𝐴))) ≺ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
4839, 47syl6 35 . . . . . . . 8 (𝐴 ∈ On → (2𝑜𝐵 → (card‘(𝐵𝑚 (ℵ‘𝐴))) ≺ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))))
4948imp 393 . . . . . . 7 ((𝐴 ∈ On ∧ 2𝑜𝐵) → (card‘(𝐵𝑚 (ℵ‘𝐴))) ≺ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
50 ensdomtr 8252 . . . . . . 7 (((𝐵𝑚 (ℵ‘𝐴)) ≈ (card‘(𝐵𝑚 (ℵ‘𝐴))) ∧ (card‘(𝐵𝑚 (ℵ‘𝐴))) ≺ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))) → (𝐵𝑚 (ℵ‘𝐴)) ≺ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
513, 49, 50sylancr 575 . . . . . 6 ((𝐴 ∈ On ∧ 2𝑜𝐵) → (𝐵𝑚 (ℵ‘𝐴)) ≺ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
52 fvex 6342 . . . . . . . . 9 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ∈ V
5352enref 8142 . . . . . . . 8 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≈ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))
54 mapen 8280 . . . . . . . 8 (((card‘(𝐵𝑚 (ℵ‘𝐴))) ≈ (𝐵𝑚 (ℵ‘𝐴)) ∧ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≈ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) → ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≈ ((𝐵𝑚 (ℵ‘𝐴)) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
552, 53, 54mp2an 672 . . . . . . 7 ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≈ ((𝐵𝑚 (ℵ‘𝐴)) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))
56 cfpwsdom.1 . . . . . . . 8 𝐵 ∈ V
57 mapxpen 8282 . . . . . . . 8 ((𝐵 ∈ V ∧ (ℵ‘𝐴) ∈ On ∧ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ∈ V) → ((𝐵𝑚 (ℵ‘𝐴)) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≈ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))))
5856, 19, 52, 57mp3an 1572 . . . . . . 7 ((𝐵𝑚 (ℵ‘𝐴)) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≈ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
5955, 58entri 8163 . . . . . 6 ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≈ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
60 sdomentr 8250 . . . . . 6 (((𝐵𝑚 (ℵ‘𝐴)) ≺ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ∧ ((card‘(𝐵𝑚 (ℵ‘𝐴))) ↑𝑚 (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≈ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))) → (𝐵𝑚 (ℵ‘𝐴)) ≺ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))))
6151, 59, 60sylancl 574 . . . . 5 ((𝐴 ∈ On ∧ 2𝑜𝐵) → (𝐵𝑚 (ℵ‘𝐴)) ≺ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))))
624xpdom2 8211 . . . . . . . . . 10 ((cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴) → ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≼ ((ℵ‘𝐴) × (ℵ‘𝐴)))
6318biimpi 206 . . . . . . . . . . 11 (𝐴 ∈ On → ω ⊆ (ℵ‘𝐴))
64 infxpen 9037 . . . . . . . . . . 11 (((ℵ‘𝐴) ∈ On ∧ ω ⊆ (ℵ‘𝐴)) → ((ℵ‘𝐴) × (ℵ‘𝐴)) ≈ (ℵ‘𝐴))
6519, 63, 64sylancr 575 . . . . . . . . . 10 (𝐴 ∈ On → ((ℵ‘𝐴) × (ℵ‘𝐴)) ≈ (ℵ‘𝐴))
66 domentr 8168 . . . . . . . . . 10 ((((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≼ ((ℵ‘𝐴) × (ℵ‘𝐴)) ∧ ((ℵ‘𝐴) × (ℵ‘𝐴)) ≈ (ℵ‘𝐴)) → ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≼ (ℵ‘𝐴))
6762, 65, 66syl2an 583 . . . . . . . . 9 (((cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴) ∧ 𝐴 ∈ On) → ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≼ (ℵ‘𝐴))
68 nsuceq0 5948 . . . . . . . . . . 11 suc 1𝑜 ≠ ∅
69 dom0 8244 . . . . . . . . . . 11 (suc 1𝑜 ≼ ∅ ↔ suc 1𝑜 = ∅)
7068, 69nemtbir 3038 . . . . . . . . . 10 ¬ suc 1𝑜 ≼ ∅
71 df-2o 7714 . . . . . . . . . . . . . 14 2𝑜 = suc 1𝑜
7271breq1i 4793 . . . . . . . . . . . . 13 (2𝑜𝐵 ↔ suc 1𝑜𝐵)
73 breq2 4790 . . . . . . . . . . . . 13 (𝐵 = ∅ → (suc 1𝑜𝐵 ↔ suc 1𝑜 ≼ ∅))
7472, 73syl5bb 272 . . . . . . . . . . . 12 (𝐵 = ∅ → (2𝑜𝐵 ↔ suc 1𝑜 ≼ ∅))
7574biimpcd 239 . . . . . . . . . . 11 (2𝑜𝐵 → (𝐵 = ∅ → suc 1𝑜 ≼ ∅))
7675adantld 478 . . . . . . . . . 10 (2𝑜𝐵 → ((((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) = ∅ ∧ 𝐵 = ∅) → suc 1𝑜 ≼ ∅))
7770, 76mtoi 190 . . . . . . . . 9 (2𝑜𝐵 → ¬ (((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) = ∅ ∧ 𝐵 = ∅))
78 mapdom2 8287 . . . . . . . . 9 ((((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) ≼ (ℵ‘𝐴) ∧ ¬ (((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))) = ∅ ∧ 𝐵 = ∅)) → (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))) ≼ (𝐵𝑚 (ℵ‘𝐴)))
7967, 77, 78syl2an 583 . . . . . . . 8 ((((cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴) ∧ 𝐴 ∈ On) ∧ 2𝑜𝐵) → (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))) ≼ (𝐵𝑚 (ℵ‘𝐴)))
80 domnsym 8242 . . . . . . . 8 ((𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))) ≼ (𝐵𝑚 (ℵ‘𝐴)) → ¬ (𝐵𝑚 (ℵ‘𝐴)) ≺ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))))
8179, 80syl 17 . . . . . . 7 ((((cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴) ∧ 𝐴 ∈ On) ∧ 2𝑜𝐵) → ¬ (𝐵𝑚 (ℵ‘𝐴)) ≺ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))))
8281expl 445 . . . . . 6 ((cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴) → ((𝐴 ∈ On ∧ 2𝑜𝐵) → ¬ (𝐵𝑚 (ℵ‘𝐴)) ≺ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))))
8382com12 32 . . . . 5 ((𝐴 ∈ On ∧ 2𝑜𝐵) → ((cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴) → ¬ (𝐵𝑚 (ℵ‘𝐴)) ≺ (𝐵𝑚 ((ℵ‘𝐴) × (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))))
8461, 83mt2d 133 . . . 4 ((𝐴 ∈ On ∧ 2𝑜𝐵) → ¬ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴))
85 domtri 9580 . . . . . 6 (((cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ∈ V ∧ (ℵ‘𝐴) ∈ V) → ((cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴) ↔ ¬ (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
8652, 4, 85mp2an 672 . . . . 5 ((cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴) ↔ ¬ (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))
8786biimpri 218 . . . 4 (¬ (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) → (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ≼ (ℵ‘𝐴))
8884, 87nsyl2 144 . . 3 ((𝐴 ∈ On ∧ 2𝑜𝐵) → (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))
8988ex 397 . 2 (𝐴 ∈ On → (2𝑜𝐵 → (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
90 fndm 6130 . . . . . 6 (ℵ Fn On → dom ℵ = On)
9136, 90ax-mp 5 . . . . 5 dom ℵ = On
9291eleq2i 2842 . . . 4 (𝐴 ∈ dom ℵ ↔ 𝐴 ∈ On)
93 ndmfv 6359 . . . 4 𝐴 ∈ dom ℵ → (ℵ‘𝐴) = ∅)
9492, 93sylnbir 320 . . 3 𝐴 ∈ On → (ℵ‘𝐴) = ∅)
95 1n0 7729 . . . . . 6 1𝑜 ≠ ∅
96 1onn 7873 . . . . . . . 8 1𝑜 ∈ ω
9796elexi 3365 . . . . . . 7 1𝑜 ∈ V
98970sdom 8247 . . . . . 6 (∅ ≺ 1𝑜 ↔ 1𝑜 ≠ ∅)
9995, 98mpbir 221 . . . . 5 ∅ ≺ 1𝑜
100 id 22 . . . . . 6 ((ℵ‘𝐴) = ∅ → (ℵ‘𝐴) = ∅)
101 oveq2 6801 . . . . . . . . . . 11 ((ℵ‘𝐴) = ∅ → (𝐵𝑚 (ℵ‘𝐴)) = (𝐵𝑚 ∅))
102 map0e 8047 . . . . . . . . . . . 12 (𝐵 ∈ V → (𝐵𝑚 ∅) = 1𝑜)
10356, 102ax-mp 5 . . . . . . . . . . 11 (𝐵𝑚 ∅) = 1𝑜
104101, 103syl6eq 2821 . . . . . . . . . 10 ((ℵ‘𝐴) = ∅ → (𝐵𝑚 (ℵ‘𝐴)) = 1𝑜)
105104fveq2d 6336 . . . . . . . . 9 ((ℵ‘𝐴) = ∅ → (card‘(𝐵𝑚 (ℵ‘𝐴))) = (card‘1𝑜))
106 cardnn 8989 . . . . . . . . . 10 (1𝑜 ∈ ω → (card‘1𝑜) = 1𝑜)
10796, 106ax-mp 5 . . . . . . . . 9 (card‘1𝑜) = 1𝑜
108105, 107syl6eq 2821 . . . . . . . 8 ((ℵ‘𝐴) = ∅ → (card‘(𝐵𝑚 (ℵ‘𝐴))) = 1𝑜)
109108fveq2d 6336 . . . . . . 7 ((ℵ‘𝐴) = ∅ → (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) = (cf‘1𝑜))
110 df-1o 7713 . . . . . . . . 9 1𝑜 = suc ∅
111110fveq2i 6335 . . . . . . . 8 (cf‘1𝑜) = (cf‘suc ∅)
112 0elon 5921 . . . . . . . . 9 ∅ ∈ On
113 cfsuc 9281 . . . . . . . . 9 (∅ ∈ On → (cf‘suc ∅) = 1𝑜)
114112, 113ax-mp 5 . . . . . . . 8 (cf‘suc ∅) = 1𝑜
115111, 114eqtri 2793 . . . . . . 7 (cf‘1𝑜) = 1𝑜
116109, 115syl6eq 2821 . . . . . 6 ((ℵ‘𝐴) = ∅ → (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) = 1𝑜)
117100, 116breq12d 4799 . . . . 5 ((ℵ‘𝐴) = ∅ → ((ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))) ↔ ∅ ≺ 1𝑜))
11899, 117mpbiri 248 . . . 4 ((ℵ‘𝐴) = ∅ → (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))
119118a1d 25 . . 3 ((ℵ‘𝐴) = ∅ → (2𝑜𝐵 → (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
12094, 119syl 17 . 2 𝐴 ∈ On → (2𝑜𝐵 → (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴))))))
12189, 120pm2.61i 176 1 (2𝑜𝐵 → (ℵ‘𝐴) ≺ (cf‘(card‘(𝐵𝑚 (ℵ‘𝐴)))))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 382  wo 836   = wceq 1631  wcel 2145  wne 2943  wrex 3062  Vcvv 3351  cun 3721  wss 3723  c0 4063  𝒫 cpw 4297   class class class wbr 4786  cmpt 4863   × cxp 5247  dom cdm 5249  ran crn 5250  Oncon0 5866  suc csuc 5868   Fn wfn 6026  cfv 6031  (class class class)co 6793  ωcom 7212  1𝑜c1o 7706  2𝑜c2o 7707  𝑚 cmap 8009  cen 8106  cdom 8107  csdm 8108  Fincfn 8109  harchar 8617  cardccrd 8961  cale 8962  cfccf 8963
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1870  ax-4 1885  ax-5 1991  ax-6 2057  ax-7 2093  ax-8 2147  ax-9 2154  ax-10 2174  ax-11 2190  ax-12 2203  ax-13 2408  ax-ext 2751  ax-rep 4904  ax-sep 4915  ax-nul 4923  ax-pow 4974  ax-pr 5034  ax-un 7096  ax-inf2 8702  ax-ac2 9487
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 837  df-3or 1072  df-3an 1073  df-tru 1634  df-ex 1853  df-nf 1858  df-sb 2050  df-eu 2622  df-mo 2623  df-clab 2758  df-cleq 2764  df-clel 2767  df-nfc 2902  df-ne 2944  df-ral 3066  df-rex 3067  df-reu 3068  df-rmo 3069  df-rab 3070  df-v 3353  df-sbc 3588  df-csb 3683  df-dif 3726  df-un 3728  df-in 3730  df-ss 3737  df-pss 3739  df-nul 4064  df-if 4226  df-pw 4299  df-sn 4317  df-pr 4319  df-tp 4321  df-op 4323  df-uni 4575  df-int 4612  df-iun 4656  df-iin 4657  df-br 4787  df-opab 4847  df-mpt 4864  df-tr 4887  df-id 5157  df-eprel 5162  df-po 5170  df-so 5171  df-fr 5208  df-se 5209  df-we 5210  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-pred 5823  df-ord 5869  df-on 5870  df-lim 5871  df-suc 5872  df-iota 5994  df-fun 6033  df-fn 6034  df-f 6035  df-f1 6036  df-fo 6037  df-f1o 6038  df-fv 6039  df-isom 6040  df-riota 6754  df-ov 6796  df-oprab 6797  df-mpt2 6798  df-om 7213  df-1st 7315  df-2nd 7316  df-wrecs 7559  df-smo 7596  df-recs 7621  df-rdg 7659  df-1o 7713  df-2o 7714  df-oadd 7717  df-er 7896  df-map 8011  df-ixp 8063  df-en 8110  df-dom 8111  df-sdom 8112  df-fin 8113  df-oi 8571  df-har 8619  df-card 8965  df-aleph 8966  df-cf 8967  df-acn 8968  df-ac 9139
This theorem is referenced by:  alephom  9609
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