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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 7779 | . . . 4 ⊢ 1P ∈ P | |
| 2 | opelxpi 4759 | . . . 4 ⊢ ((1P ∈ P ∧ 1P ∈ P) → 〈1P, 1P〉 ∈ (P × P)) | |
| 3 | 1, 1, 2 | mp2an 426 | . . 3 ⊢ 〈1P, 1P〉 ∈ (P × P) |
| 4 | enrex 7962 | . . . 4 ⊢ ~R ∈ V | |
| 5 | 4 | ecelqsi 6763 | . . 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 7956 | . 2 ⊢ 0R = [〈1P, 1P〉] ~R | |
| 8 | df-nr 7952 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 9 | 6, 7, 8 | 3eltr4i 2312 | 1 ⊢ 0R ∈ R |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2201 〈cop 3673 × cxp 4725 [cec 6705 / cqs 6706 Pcnp 7516 1Pc1p 7517 ~R cer 7521 Rcnr 7522 0Rc0r 7523 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2203 ax-14 2204 ax-ext 2212 ax-coll 4205 ax-sep 4208 ax-nul 4216 ax-pow 4266 ax-pr 4301 ax-un 4532 ax-setind 4637 ax-iinf 4688 |
| This theorem depends on definitions: df-bi 117 df-dc 842 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ne 2402 df-ral 2514 df-rex 2515 df-reu 2516 df-rab 2518 df-v 2803 df-sbc 3031 df-csb 3127 df-dif 3201 df-un 3203 df-in 3205 df-ss 3212 df-nul 3494 df-pw 3655 df-sn 3676 df-pr 3677 df-op 3679 df-uni 3895 df-int 3930 df-iun 3973 df-br 4090 df-opab 4152 df-mpt 4153 df-tr 4189 df-eprel 4388 df-id 4392 df-po 4395 df-iso 4396 df-iord 4465 df-on 4467 df-suc 4470 df-iom 4691 df-xp 4733 df-rel 4734 df-cnv 4735 df-co 4736 df-dm 4737 df-rn 4738 df-res 4739 df-ima 4740 df-iota 5288 df-fun 5330 df-fn 5331 df-f 5332 df-f1 5333 df-fo 5334 df-f1o 5335 df-fv 5336 df-ov 6026 df-oprab 6027 df-mpo 6028 df-1st 6308 df-2nd 6309 df-recs 6476 df-irdg 6541 df-1o 6587 df-oadd 6591 df-omul 6592 df-er 6707 df-ec 6709 df-qs 6713 df-ni 7529 df-pli 7530 df-mi 7531 df-lti 7532 df-plpq 7569 df-mpq 7570 df-enq 7572 df-nqqs 7573 df-plqqs 7574 df-mqqs 7575 df-1nqqs 7576 df-rq 7577 df-ltnqqs 7578 df-inp 7691 df-i1p 7692 df-enr 7951 df-nr 7952 df-0r 7956 |
| This theorem is referenced by: addgt0sr 8000 ltadd1sr 8001 map2psrprg 8030 suplocsrlempr 8032 opelreal 8052 elreal 8053 elrealeu 8054 elreal2 8055 eqresr 8061 addresr 8062 mulresr 8063 pitonn 8073 peano2nnnn 8078 axresscn 8085 axicn 8088 axi2m1 8100 ax0id 8103 axprecex 8105 axcnre 8106 |
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