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Mirrors > Home > MPE Home > Th. List > nnexALT | Structured version Visualization version GIF version |
Description: Alternate proof of nnex 12270, more direct, that makes use of ax-rep 5285. (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 12265 | . 2 ⊢ ℕ = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) “ ω) | |
2 | rdgfun 8455 | . . 3 ⊢ Fun rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) | |
3 | omex 9681 | . . 3 ⊢ ω ∈ V | |
4 | funimaexg 6654 | . . 3 ⊢ ((Fun rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) ∧ ω ∈ V) → (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) “ ω) ∈ V) | |
5 | 2, 3, 4 | mp2an 692 | . 2 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 1) “ ω) ∈ V |
6 | 1, 5 | eqeltri 2835 | 1 ⊢ ℕ ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2106 Vcvv 3478 ↦ cmpt 5231 “ cima 5692 Fun wfun 6557 (class class class)co 7431 ωcom 7887 reccrdg 8448 1c1 11154 + caddc 11156 ℕcn 12264 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-rep 5285 ax-sep 5302 ax-nul 5312 ax-pr 5438 ax-un 7754 ax-inf2 9679 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-ral 3060 df-rex 3069 df-reu 3379 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-pss 3983 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5583 df-eprel 5589 df-po 5597 df-so 5598 df-fr 5641 df-we 5643 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-pred 6323 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-ov 7434 df-om 7888 df-2nd 8014 df-frecs 8305 df-wrecs 8336 df-recs 8410 df-rdg 8449 df-nn 12265 |
This theorem is referenced by: zexALT 12631 qexALT 13004 reexALT 13024 |
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