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| Mirrors > Home > MPE Home > Th. List > 0r | Structured version Visualization version GIF version | ||
| Description: The constant 0R is a signed real. (Contributed by NM, 9-Aug-1995.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| 0r | ⊢ 0R ∈ R |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1pr 11018 | . . . 4 ⊢ 1P ∈ P | |
| 2 | opelxpi 5703 | . . . 4 ⊢ ((1P ∈ P ∧ 1P ∈ P) → 〈1P, 1P〉 ∈ (P × P)) | |
| 3 | 1, 1, 2 | mp2an 705 | . . 3 ⊢ 〈1P, 1P〉 ∈ (P × P) |
| 4 | enrex 11070 | . . . 4 ⊢ ~R ∈ V | |
| 5 | 4 | ecelqsi 8776 | . . 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 11063 | . 2 ⊢ 0R = [〈1P, 1P〉] ~R | |
| 8 | df-nr 11059 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 9 | 6, 7, 8 | 3eltr4i 2879 | 1 ⊢ 0R ∈ R |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2146 〈cop 4600 × cxp 5664 [cec 8701 / cqs 8702 Pcnp 10862 1Pc1p 10863 ~R cer 10867 Rcnr 10868 0Rc0r 10869 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-inf2 9620 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-int 4918 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7426 df-oprab 7427 df-mpo 7428 df-om 7872 df-1st 7995 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-rdg 8406 df-1o 8462 df-oadd 8466 df-omul 8467 df-er 8703 df-ec 8705 df-qs 8709 df-ni 10875 df-pli 10876 df-mi 10877 df-lti 10878 df-plpq 10911 df-mpq 10912 df-ltpq 10913 df-enq 10914 df-nq 10915 df-erq 10916 df-plq 10917 df-mq 10918 df-1nq 10919 df-rq 10920 df-ltnq 10921 df-np 10984 df-1p 10985 df-enr 11058 df-nr 11059 df-0r 11063 |
| This theorem is used by: sqgt0sr 11109 opelreal 11133 elreal 11134 elreal2 11135 eqresr 11140 addresr 11141 mulresr 11142 axresscn 11151 axicn 11153 axi2m1 11162 axcnre 11167 |
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