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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 13011), but the proof requires the axiom of replacement, while the derivation from the construction here does not. Thus, we can avoid ax-rep 5239 in later theorems by invoking Axiom ax-cnex 11157 instead of cnexALT 13011. Use cnex 11182 instead. (Contributed by Mario Carneiro, 17-Nov-2014.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| axcnex | ⊢ ℂ ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-c 11107 | . 2 ⊢ ℂ = (R × R) | |
| 2 | nrex1 11050 | . . 3 ⊢ R ∈ V | |
| 3 | 2, 2 | xpex 7753 | . 2 ⊢ (R × R) ∈ V |
| 4 | 1, 3 | eqeltri 2859 | 1 ⊢ ℂ ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2143 Vcvv 3455 × cxp 5661 Rcnr 10851 ℂcc 11099 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-inf2 9611 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-int 4914 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-1o 8454 df-oadd 8458 df-omul 8459 df-er 8695 df-ec 8697 df-qs 8701 df-ni 10858 df-pli 10859 df-mi 10860 df-lti 10861 df-plpq 10894 df-mpq 10895 df-ltpq 10896 df-enq 10897 df-nq 10898 df-erq 10899 df-plq 10900 df-mq 10901 df-1nq 10902 df-rq 10903 df-ltnq 10904 df-np 10967 df-plp 10969 df-ltp 10971 df-enr 11041 df-nr 11042 df-c 11107 |
| This theorem is referenced by: (None) |
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