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| Mirrors > Home > ILE Home > Th. List > 0r | GIF version | ||
| Description: The constant 0R is a signed real. (Contributed by NM, 9-Aug-1995.) |
| Ref | Expression |
|---|---|
| 0r | ⊢ 0R ∈ R |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1pr 7749 | . . . 4 ⊢ 1P ∈ P | |
| 2 | opelxpi 4751 | . . . 4 ⊢ ((1P ∈ P ∧ 1P ∈ P) → 〈1P, 1P〉 ∈ (P × P)) | |
| 3 | 1, 1, 2 | mp2an 426 | . . 3 ⊢ 〈1P, 1P〉 ∈ (P × P) |
| 4 | enrex 7932 | . . . 4 ⊢ ~R ∈ V | |
| 5 | 4 | ecelqsi 6744 | . . 3 ⊢ (〈1P, 1P〉 ∈ (P × P) → [〈1P, 1P〉] ~R ∈ ((P × P) / ~R )) |
| 6 | 3, 5 | ax-mp 5 | . 2 ⊢ [〈1P, 1P〉] ~R ∈ ((P × P) / ~R ) |
| 7 | df-0r 7926 | . 2 ⊢ 0R = [〈1P, 1P〉] ~R | |
| 8 | df-nr 7922 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 9 | 6, 7, 8 | 3eltr4i 2311 | 1 ⊢ 0R ∈ R |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 〈cop 3669 × cxp 4717 [cec 6686 / cqs 6687 Pcnp 7486 1Pc1p 7487 ~R cer 7491 Rcnr 7492 0Rc0r 7493 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4199 ax-sep 4202 ax-nul 4210 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-iinf 4680 |
| This theorem depends on definitions: df-bi 117 df-dc 840 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-nul 3492 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-iun 3967 df-br 4084 df-opab 4146 df-mpt 4147 df-tr 4183 df-eprel 4380 df-id 4384 df-po 4387 df-iso 4388 df-iord 4457 df-on 4459 df-suc 4462 df-iom 4683 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-rn 4730 df-res 4731 df-ima 4732 df-iota 5278 df-fun 5320 df-fn 5321 df-f 5322 df-f1 5323 df-fo 5324 df-f1o 5325 df-fv 5326 df-ov 6010 df-oprab 6011 df-mpo 6012 df-1st 6292 df-2nd 6293 df-recs 6457 df-irdg 6522 df-1o 6568 df-oadd 6572 df-omul 6573 df-er 6688 df-ec 6690 df-qs 6694 df-ni 7499 df-pli 7500 df-mi 7501 df-lti 7502 df-plpq 7539 df-mpq 7540 df-enq 7542 df-nqqs 7543 df-plqqs 7544 df-mqqs 7545 df-1nqqs 7546 df-rq 7547 df-ltnqqs 7548 df-inp 7661 df-i1p 7662 df-enr 7921 df-nr 7922 df-0r 7926 |
| This theorem is referenced by: addgt0sr 7970 ltadd1sr 7971 map2psrprg 8000 suplocsrlempr 8002 opelreal 8022 elreal 8023 elrealeu 8024 elreal2 8025 eqresr 8031 addresr 8032 mulresr 8033 pitonn 8043 peano2nnnn 8048 axresscn 8055 axicn 8058 axi2m1 8070 ax0id 8073 axprecex 8075 axcnre 8076 |
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