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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 8795 (and not requiring enrer 11082), but it would add a dependency on ax-rep 5254. (Contributed by Mario Carneiro, 17-Nov-2014.) Extract proof from that of axcnex 11166. (Revised by BJ, 4-Feb-2023.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| nrex1 | ⊢ R ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-nr 11075 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 2 | npex 11005 | . . . . 5 ⊢ P ∈ V | |
| 3 | 2, 2 | xpex 7752 | . . . 4 ⊢ (P × P) ∈ V |
| 4 | 3 | pwex 5355 | . . 3 ⊢ 𝒫 (P × P) ∈ V |
| 5 | enrer 11082 | . . . . . 6 ⊢ ~R Er (P × P) | |
| 6 | 5 | a1i 11 | . . . . 5 ⊢ (⊤ → ~R Er (P × P)) |
| 7 | 6 | qsss 8797 | . . . 4 ⊢ (⊤ → ((P × P) / ~R ) ⊆ 𝒫 (P × P)) |
| 8 | 7 | mptru 1547 | . . 3 ⊢ ((P × P) / ~R ) ⊆ 𝒫 (P × P) |
| 9 | 4, 8 | ssexi 5297 | . 2 ⊢ ((P × P) / ~R ) ∈ V |
| 10 | 1, 9 | eqeltri 2831 | 1 ⊢ R ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ⊤wtru 1541 ∈ wcel 2109 Vcvv 3464 ⊆ wss 3931 𝒫 cpw 4580 × cxp 5657 Er wer 8721 / cqs 8723 Pcnp 10878 ~R cer 10883 Rcnr 10884 |
| 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 2708 ax-sep 5271 ax-nul 5281 ax-pow 5340 ax-pr 5407 ax-un 7734 ax-inf2 9660 |
| 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 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-rmo 3364 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3771 df-csb 3880 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-pss 3951 df-nul 4314 df-if 4506 df-pw 4582 df-sn 4607 df-pr 4609 df-op 4613 df-uni 4889 df-int 4928 df-iun 4974 df-br 5125 df-opab 5187 df-mpt 5207 df-tr 5235 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6295 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7867 df-1st 7993 df-2nd 7994 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-1o 8485 df-oadd 8489 df-omul 8490 df-er 8724 df-ec 8726 df-qs 8730 df-ni 10891 df-pli 10892 df-mi 10893 df-lti 10894 df-plpq 10927 df-mpq 10928 df-ltpq 10929 df-enq 10930 df-nq 10931 df-erq 10932 df-plq 10933 df-mq 10934 df-1nq 10935 df-rq 10936 df-ltnq 10937 df-np 11000 df-plp 11002 df-ltp 11004 df-enr 11074 df-nr 11075 |
| This theorem is referenced by: axcnex 11166 bj-inftyexpitaudisj 37228 |
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