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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 7874 | . . . 4 ⊢ 1P ∈ P | |
| 2 | opelxpi 4783 | . . . 4 ⊢ ((1P ∈ P ∧ 1P ∈ P) → 〈1P, 1P〉 ∈ (P × P)) | |
| 3 | 1, 1, 2 | mp2an 426 | . . 3 ⊢ 〈1P, 1P〉 ∈ (P × P) |
| 4 | enrex 8057 | . . . 4 ⊢ ~R ∈ V | |
| 5 | 4 | ecelqsi 6825 | . . 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 8051 | . 2 ⊢ 0R = [〈1P, 1P〉] ~R | |
| 8 | df-nr 8047 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 9 | 6, 7, 8 | 3eltr4i 2316 | 1 ⊢ 0R ∈ R |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2205 〈cop 3694 × cxp 4749 [cec 6767 / cqs 6768 Pcnp 7611 1Pc1p 7612 ~R cer 7616 Rcnr 7617 0Rc0r 7618 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4227 ax-sep 4230 ax-nul 4238 ax-pow 4289 ax-pr 4324 ax-un 4556 ax-setind 4661 ax-iinf 4712 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-ral 2527 df-rex 2528 df-reu 2529 df-rab 2531 df-v 2817 df-sbc 3045 df-csb 3141 df-dif 3215 df-un 3217 df-in 3219 df-ss 3226 df-nul 3511 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-int 3952 df-iun 3995 df-br 4112 df-opab 4174 df-mpt 4175 df-tr 4211 df-eprel 4412 df-id 4416 df-po 4419 df-iso 4420 df-iord 4489 df-on 4491 df-suc 4494 df-iom 4715 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-rn 4762 df-res 4763 df-ima 4764 df-iota 5314 df-fun 5356 df-fn 5357 df-f 5358 df-f1 5359 df-fo 5360 df-f1o 5361 df-fv 5362 df-ov 6055 df-oprab 6056 df-mpo 6057 df-1st 6336 df-2nd 6337 df-recs 6538 df-irdg 6603 df-1o 6649 df-oadd 6653 df-omul 6654 df-er 6769 df-ec 6771 df-qs 6775 df-ni 7624 df-pli 7625 df-mi 7626 df-lti 7627 df-plpq 7664 df-mpq 7665 df-enq 7667 df-nqqs 7668 df-plqqs 7669 df-mqqs 7670 df-1nqqs 7671 df-rq 7672 df-ltnqqs 7673 df-inp 7786 df-i1p 7787 df-enr 8046 df-nr 8047 df-0r 8051 |
| This theorem is referenced by: addgt0sr 8095 ltadd1sr 8096 map2psrprg 8125 suplocsrlempr 8127 opelreal 8147 elreal 8148 elrealeu 8149 elreal2 8150 eqresr 8156 addresr 8157 mulresr 8158 pitonn 8168 peano2nnnn 8173 axresscn 8180 axicn 8183 axi2m1 8195 ax0id 8198 axprecex 8200 axcnre 8201 |
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