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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 8800 (and not requiring enrer 11155), but it would add a dependency on ax-rep 5231. (Contributed by Mario Carneiro, 17-Nov-2014.) Extract proof from that of axcnex 11239. (Revised by BJ, 4-Feb-2023.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| nrex1 | ⊢ R ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-nr 11148 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 2 | npex 11078 | . . . . 5 ⊢ P ∈ V | |
| 3 | 2, 2 | xpex 7771 | . . . 4 ⊢ (P × P) ∈ V |
| 4 | 3 | pwex 5342 | . . 3 ⊢ 𝒫 (P × P) ∈ V |
| 5 | enrer 11155 | . . . . . 6 ⊢ ~R Er (P × P) | |
| 6 | 5 | a1i 11 | . . . . 5 ⊢ (⊤ → ~R Er (P × P)) |
| 7 | 6 | qsss 8803 | . . . 4 ⊢ (⊤ → ((P × P) / ~R ) ⊆ 𝒫 (P × P)) |
| 8 | 7 | mptru 1576 | . . 3 ⊢ ((P × P) / ~R ) ⊆ 𝒫 (P × P) |
| 9 | 4, 8 | ssexi 5284 | . 2 ⊢ ((P × P) / ~R ) ∈ V |
| 10 | 1, 9 | eqeltri 2856 | 1 ⊢ R ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ⊤wtru 1570 ∈ wcel 2144 Vcvv 3450 ⊆ wss 3896 𝒫 cpw 4556 × cxp 5649 Er wer 8721 / cqs 8723 Pcnp 10951 ~R cer 10956 Rcnr 10957 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 ax-inf2 9649 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6307 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7427 df-oprab 7428 df-mpo 7429 df-om 7882 df-1st 8005 df-2nd 8006 df-frecs 8306 df-wrecs 8337 df-recs 8386 df-rdg 8425 df-1o 8483 df-oadd 8487 df-omul 8488 df-er 8724 df-ec 8726 df-qs 8730 df-ni 10964 df-pli 10965 df-mi 10966 df-lti 10967 df-plpq 11000 df-mpq 11001 df-ltpq 11002 df-enq 11003 df-nq 11004 df-erq 11005 df-plq 11006 df-mq 11007 df-1nq 11008 df-rq 11009 df-ltnq 11010 df-np 11073 df-plp 11075 df-ltp 11077 df-enr 11147 df-nr 11148 |
| This theorem is used by: axcnex 11239 bj-inftyexpitaudisj 38235 |
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