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Mirrors > Home > MPE Home > Th. List > axcnex | Structured version Visualization version GIF version |
Description: The complex numbers form a set. This axiom is redundant in the presence of the other axioms (see cnexALT 12655), but the proof requires the axiom of replacement, while the derivation from the construction here does not. Thus, we can avoid ax-rep 5205 in later theorems by invoking Axiom ax-cnex 10858 instead of cnexALT 12655. Use cnex 10883 instead. (Contributed by Mario Carneiro, 17-Nov-2014.) (New usage is discouraged.) |
Ref | Expression |
---|---|
axcnex | ⊢ ℂ ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-c 10808 | . 2 ⊢ ℂ = (R × R) | |
2 | nrex1 10751 | . . 3 ⊢ R ∈ V | |
3 | 2, 2 | xpex 7581 | . 2 ⊢ (R × R) ∈ V |
4 | 1, 3 | eqeltri 2835 | 1 ⊢ ℂ ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2108 Vcvv 3422 × cxp 5578 Rcnr 10552 ℂcc 10800 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-oadd 8271 df-omul 8272 df-er 8456 df-ec 8458 df-qs 8462 df-ni 10559 df-pli 10560 df-mi 10561 df-lti 10562 df-plpq 10595 df-mpq 10596 df-ltpq 10597 df-enq 10598 df-nq 10599 df-erq 10600 df-plq 10601 df-mq 10602 df-1nq 10603 df-rq 10604 df-ltnq 10605 df-np 10668 df-plp 10670 df-ltp 10672 df-enr 10742 df-nr 10743 df-c 10808 |
This theorem is referenced by: (None) |
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