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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 8692 (and not requiring enrer 10949), but it would add a dependency on ax-rep 5212. (Contributed by Mario Carneiro, 17-Nov-2014.) Extract proof from that of axcnex 11033. (Revised by BJ, 4-Feb-2023.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| nrex1 | ⊢ R ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-nr 10942 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 2 | npex 10872 | . . . . 5 ⊢ P ∈ V | |
| 3 | 2, 2 | xpex 7681 | . . . 4 ⊢ (P × P) ∈ V |
| 4 | 3 | pwex 5313 | . . 3 ⊢ 𝒫 (P × P) ∈ V |
| 5 | enrer 10949 | . . . . . 6 ⊢ ~R Er (P × P) | |
| 6 | 5 | a1i 11 | . . . . 5 ⊢ (⊤ → ~R Er (P × P)) |
| 7 | 6 | qsss 8695 | . . . 4 ⊢ (⊤ → ((P × P) / ~R ) ⊆ 𝒫 (P × P)) |
| 8 | 7 | mptru 1548 | . . 3 ⊢ ((P × P) / ~R ) ⊆ 𝒫 (P × P) |
| 9 | 4, 8 | ssexi 5255 | . 2 ⊢ ((P × P) / ~R ) ∈ V |
| 10 | 1, 9 | eqeltri 2827 | 1 ⊢ R ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ⊤wtru 1542 ∈ wcel 2111 Vcvv 3436 ⊆ wss 3897 𝒫 cpw 4545 × cxp 5609 Er wer 8614 / cqs 8616 Pcnp 10745 ~R cer 10750 Rcnr 10751 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5229 ax-nul 5239 ax-pow 5298 ax-pr 5365 ax-un 7663 ax-inf2 9526 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4279 df-if 4471 df-pw 4547 df-sn 4572 df-pr 4574 df-op 4578 df-uni 4855 df-int 4893 df-iun 4938 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5506 df-eprel 5511 df-po 5519 df-so 5520 df-fr 5564 df-we 5566 df-xp 5617 df-rel 5618 df-cnv 5619 df-co 5620 df-dm 5621 df-rn 5622 df-res 5623 df-ima 5624 df-pred 6243 df-ord 6304 df-on 6305 df-lim 6306 df-suc 6307 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-ov 7344 df-oprab 7345 df-mpo 7346 df-om 7792 df-1st 7916 df-2nd 7917 df-frecs 8206 df-wrecs 8237 df-recs 8286 df-rdg 8324 df-1o 8380 df-oadd 8384 df-omul 8385 df-er 8617 df-ec 8619 df-qs 8623 df-ni 10758 df-pli 10759 df-mi 10760 df-lti 10761 df-plpq 10794 df-mpq 10795 df-ltpq 10796 df-enq 10797 df-nq 10798 df-erq 10799 df-plq 10800 df-mq 10801 df-1nq 10802 df-rq 10803 df-ltnq 10804 df-np 10867 df-plp 10869 df-ltp 10871 df-enr 10941 df-nr 10942 |
| This theorem is referenced by: axcnex 11033 bj-inftyexpitaudisj 37239 |
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