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| Mirrors > Home > MPE Home > Th. List > nrex1 | Structured version Visualization version GIF version | ||
| Description: The class of signed reals is a set. Note that a shorter proof is possible using qsex 8723 (and not requiring enrer 10992), but it would add a dependency on ax-rep 5229. (Contributed by Mario Carneiro, 17-Nov-2014.) Extract proof from that of axcnex 11076. (Revised by BJ, 4-Feb-2023.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| nrex1 | ⊢ R ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-nr 10985 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 2 | npex 10915 | . . . . 5 ⊢ P ∈ V | |
| 3 | 2, 2 | xpex 7709 | . . . 4 ⊢ (P × P) ∈ V |
| 4 | 3 | pwex 5330 | . . 3 ⊢ 𝒫 (P × P) ∈ V |
| 5 | enrer 10992 | . . . . . 6 ⊢ ~R Er (P × P) | |
| 6 | 5 | a1i 11 | . . . . 5 ⊢ (⊤ → ~R Er (P × P)) |
| 7 | 6 | qsss 8726 | . . . 4 ⊢ (⊤ → ((P × P) / ~R ) ⊆ 𝒫 (P × P)) |
| 8 | 7 | mptru 1547 | . . 3 ⊢ ((P × P) / ~R ) ⊆ 𝒫 (P × P) |
| 9 | 4, 8 | ssexi 5272 | . 2 ⊢ ((P × P) / ~R ) ∈ V |
| 10 | 1, 9 | eqeltri 2824 | 1 ⊢ R ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ⊤wtru 1541 ∈ wcel 2109 Vcvv 3444 ⊆ wss 3911 𝒫 cpw 4559 × cxp 5629 Er wer 8645 / cqs 8647 Pcnp 10788 ~R cer 10793 Rcnr 10794 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-inf2 9570 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-int 4907 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-ord 6323 df-on 6324 df-lim 6325 df-suc 6326 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-ov 7372 df-oprab 7373 df-mpo 7374 df-om 7823 df-1st 7947 df-2nd 7948 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-1o 8411 df-oadd 8415 df-omul 8416 df-er 8648 df-ec 8650 df-qs 8654 df-ni 10801 df-pli 10802 df-mi 10803 df-lti 10804 df-plpq 10837 df-mpq 10838 df-ltpq 10839 df-enq 10840 df-nq 10841 df-erq 10842 df-plq 10843 df-mq 10844 df-1nq 10845 df-rq 10846 df-ltnq 10847 df-np 10910 df-plp 10912 df-ltp 10914 df-enr 10984 df-nr 10985 |
| This theorem is referenced by: axcnex 11076 bj-inftyexpitaudisj 37166 |
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