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Related theorems GIF version |
| Description: Lemma for our Axiom of Infinity => standard Axiom of Infinity. See inf3 4629 for detailed description. |
| Ref | Expression |
|---|---|
| inf3lem.1 | ⊢ G = {〈y, z〉∣z = {w ∈ x∣(w ∩ x) ⊆ y}} |
| inf3lem.2 | ⊢ F = (rec(G, ∅) ↾ ω) |
| inf3lem.3 | ⊢ A ∈ V |
| inf3lem.4 | ⊢ B ∈ V |
| Ref | Expression |
|---|---|
| inf3lem4 | ⊢ ((x ≠ ∅ ⋀ x ⊆ ∪x) → (A ∈ ω → (F ‘A) ⊂ (F ‘suc A))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | inf3lem.1 | . . . . 5 ⊢ G = {〈y, z〉∣z = {w ∈ x∣(w ∩ x) ⊆ y}} | |
| 2 | inf3lem.2 | . . . . 5 ⊢ F = (rec(G, ∅) ↾ ω) | |
| 3 | inf3lem.3 | . . . . 5 ⊢ A ∈ V | |
| 4 | inf3lem.4 | . . . . 5 ⊢ B ∈ V | |
| 5 | 1, 2, 3, 4 | inf3lem1 4622 | . . . 4 ⊢ (A ∈ ω → (F ‘A) ⊆ (F ‘suc A)) |
| 6 | 5 | a1i 8 | . . 3 ⊢ ((x ≠ ∅ ⋀ x ⊆ ∪x) → (A ∈ ω → (F ‘A) ⊆ (F ‘suc A))) |
| 7 | 1, 2, 3, 4 | inf3lem3 4624 | . . 3 ⊢ ((x ≠ ∅ ⋀ x ⊆ ∪x) → (A ∈ ω → (F ‘A) ≠ (F ‘suc A))) |
| 8 | 6, 7 | jcad 602 | . 2 ⊢ ((x ≠ ∅ ⋀ x ⊆ ∪x) → (A ∈ ω → ((F ‘A) ⊆ (F ‘suc A) ⋀ (F ‘A) ≠ (F ‘suc A)))) |
| 9 | df-pss 2058 | . 2 ⊢ ((F ‘A) ⊂ (F ‘suc A) ↔ ((F ‘A) ⊆ (F ‘suc A) ⋀ (F ‘A) ≠ (F ‘suc A))) | |
| 10 | 8, 9 | syl6ibr 213 | 1 ⊢ ((x ≠ ∅ ⋀ x ⊆ ∪x) → (A ∈ ω → (F ‘A) ⊂ (F ‘suc A))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ⋀ wa 223 = wceq 958 ∈ wcel 960 ≠ wne 1588 {crab 1651 Vcvv 1814 ∩ cin 2049 ⊆ wss 2050 ⊂ wpss 2051 ∅c0 2283 ∪cuni 2507 {copab 2671 suc csuc 2956 ωcom 3137 ↾ cres 3178 ‘cfv 3188 reccrdg 3937 |
| This theorem is referenced by: inf3lem5 4626 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-9 967 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-rep 2698 ax-sep 2708 ax-nul 2715 ax-pow 2748 ax-pr 2785 ax-un 2872 ax-reg 4602 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 778 df-3an 779 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-ral 1652 df-rex 1653 df-rab 1655 df-v 1815 df-sbc 1945 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-pss 2058 df-nul 2284 df-if 2366 df-pw 2406 df-sn 2416 df-pr 2417 df-tp 2419 df-op 2420 df-uni 2508 df-iun 2572 df-br 2625 df-opab 2672 df-tr 2686 df-eprel 2838 df-id 2841 df-po 2846 df-so 2856 df-fr 2923 df-we 2940 df-ord 2957 df-on 2958 df-lim 2959 df-suc 2960 df-om 3138 df-xp 3190 df-rel 3191 df-cnv 3192 df-co 3193 df-dm 3194 df-rn 3195 df-res 3196 df-ima 3197 df-fun 3198 df-fn 3199 df-fv 3204 df-rdg 3938 |