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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 8356 (and not requiring enrer 10485), but it would add a dependency on ax-rep 5190. (Contributed by Mario Carneiro, 17-Nov-2014.) Extract proof from that of axcnex 10569. (Revised by BJ, 4-Feb-2023.) (New usage is discouraged.) |
Ref | Expression |
---|---|
nrex1 | ⊢ R ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-nr 10478 | . 2 ⊢ R = ((P × P) / ~R ) | |
2 | npex 10408 | . . . . 5 ⊢ P ∈ V | |
3 | 2, 2 | xpex 7476 | . . . 4 ⊢ (P × P) ∈ V |
4 | 3 | pwex 5281 | . . 3 ⊢ 𝒫 (P × P) ∈ V |
5 | enrer 10485 | . . . . . 6 ⊢ ~R Er (P × P) | |
6 | 5 | a1i 11 | . . . . 5 ⊢ (⊤ → ~R Er (P × P)) |
7 | 6 | qsss 8358 | . . . 4 ⊢ (⊤ → ((P × P) / ~R ) ⊆ 𝒫 (P × P)) |
8 | 7 | mptru 1544 | . . 3 ⊢ ((P × P) / ~R ) ⊆ 𝒫 (P × P) |
9 | 4, 8 | ssexi 5226 | . 2 ⊢ ((P × P) / ~R ) ∈ V |
10 | 1, 9 | eqeltri 2909 | 1 ⊢ R ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ⊤wtru 1538 ∈ wcel 2114 Vcvv 3494 ⊆ wss 3936 𝒫 cpw 4539 × cxp 5553 Er wer 8286 / cqs 8288 Pcnp 10281 ~R cer 10286 Rcnr 10287 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-inf2 9104 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-int 4877 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-pred 6148 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-ov 7159 df-oprab 7160 df-mpo 7161 df-om 7581 df-1st 7689 df-2nd 7690 df-wrecs 7947 df-recs 8008 df-rdg 8046 df-1o 8102 df-oadd 8106 df-omul 8107 df-er 8289 df-ec 8291 df-qs 8295 df-ni 10294 df-pli 10295 df-mi 10296 df-lti 10297 df-plpq 10330 df-mpq 10331 df-ltpq 10332 df-enq 10333 df-nq 10334 df-erq 10335 df-plq 10336 df-mq 10337 df-1nq 10338 df-rq 10339 df-ltnq 10340 df-np 10403 df-plp 10405 df-ltp 10407 df-enr 10477 df-nr 10478 |
This theorem is referenced by: axcnex 10569 bj-inftyexpitaudisj 34490 |
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