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| Mirrors > Home > MPE Home > Th. List > inf3lemb | Structured version Visualization version GIF version | ||
| Description: Lemma for our Axiom of Infinity => standard Axiom of Infinity. See inf3 9584 for detailed description. (Contributed by NM, 28-Oct-1996.) |
| Ref | Expression |
|---|---|
| inf3lem.1 | ⊢ 𝐺 = (𝑦 ∈ V ↦ {𝑤 ∈ 𝑥 ∣ (𝑤 ∩ 𝑥) ⊆ 𝑦}) |
| inf3lem.2 | ⊢ 𝐹 = (rec(𝐺, ∅) ↾ ω) |
| inf3lem.3 | ⊢ 𝐴 ∈ V |
| inf3lem.4 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| inf3lemb | ⊢ (𝐹‘∅) = ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | inf3lem.2 | . . 3 ⊢ 𝐹 = (rec(𝐺, ∅) ↾ ω) | |
| 2 | 1 | fveq1i 6863 | . 2 ⊢ (𝐹‘∅) = ((rec(𝐺, ∅) ↾ ω)‘∅) |
| 3 | 0ex 5254 | . . 3 ⊢ ∅ ∈ V | |
| 4 | fr0g 8401 | . . 3 ⊢ (∅ ∈ V → ((rec(𝐺, ∅) ↾ ω)‘∅) = ∅) | |
| 5 | 3, 4 | ax-mp 5 | . 2 ⊢ ((rec(𝐺, ∅) ↾ ω)‘∅) = ∅ |
| 6 | 2, 5 | eqtri 2784 | 1 ⊢ (𝐹‘∅) = ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1559 ∈ wcel 2141 {crab 3413 Vcvv 3453 ∩ cin 3901 ⊆ wss 3902 ∅c0 4283 ↦ cmpt 5178 ↾ cres 5645 ‘cfv 6516 ωcom 7841 reccrdg 8374 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pr 5387 ax-un 7713 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6283 df-ord 6344 df-on 6345 df-lim 6346 df-suc 6347 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-ov 7394 df-om 7842 df-2nd 7966 df-frecs 8256 df-wrecs 8287 df-recs 8336 df-rdg 8375 |
| This theorem is referenced by: inf3lemd 9576 inf3lem1 9577 inf3lem2 9578 |
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