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Mirrors > Home > MPE Home > Th. List > nnexALT | Structured version Visualization version GIF version |
Description: Alternate proof of nnex 12167, more direct, that makes use of ax-rep 5246. (Contributed by Mario Carneiro, 3-May-2014.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
nnexALT | ⊢ ℕ ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-nn 12162 | . 2 ⊢ ℕ = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) “ ω) | |
2 | rdgfun 8366 | . . 3 ⊢ Fun rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) | |
3 | omex 9587 | . . 3 ⊢ ω ∈ V | |
4 | funimaexg 6591 | . . 3 ⊢ ((Fun rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) ∧ ω ∈ V) → (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) “ ω) ∈ V) | |
5 | 2, 3, 4 | mp2an 691 | . 2 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) “ ω) ∈ V |
6 | 1, 5 | eqeltri 2830 | 1 ⊢ ℕ ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2107 Vcvv 3447 ↦ cmpt 5192 “ cima 5640 Fun wfun 6494 (class class class)co 7361 ωcom 7806 reccrdg 8359 1c1 11060 + caddc 11062 ℕcn 12161 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5246 ax-sep 5260 ax-nul 5267 ax-pr 5388 ax-un 7676 ax-inf2 9585 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2941 df-ral 3062 df-rex 3071 df-reu 3353 df-rab 3407 df-v 3449 df-sbc 3744 df-csb 3860 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3933 df-nul 4287 df-if 4491 df-pw 4566 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4870 df-iun 4960 df-br 5110 df-opab 5172 df-mpt 5193 df-tr 5227 df-id 5535 df-eprel 5541 df-po 5549 df-so 5550 df-fr 5592 df-we 5594 df-xp 5643 df-rel 5644 df-cnv 5645 df-co 5646 df-dm 5647 df-rn 5648 df-res 5649 df-ima 5650 df-pred 6257 df-ord 6324 df-on 6325 df-lim 6326 df-suc 6327 df-iota 6452 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-ov 7364 df-om 7807 df-2nd 7926 df-frecs 8216 df-wrecs 8247 df-recs 8321 df-rdg 8360 df-nn 12162 |
This theorem is referenced by: zexALT 12527 qexALT 12897 reexALT 12917 |
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