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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 11103 | . . . 4 ⊢ 1P ∈ P | |
| 2 | opelxpi 5687 | . . . 4 ⊢ ((1P ∈ P ∧ 1P ∈ P) → 〈1P, 1P〉 ∈ (P × P)) | |
| 3 | 1, 1, 2 | mp2an 705 | . . 3 ⊢ 〈1P, 1P〉 ∈ (P × P) |
| 4 | enrex 11155 | . . . 4 ⊢ ~R ∈ V | |
| 5 | 4 | ecelqsi 8793 | . . 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 11148 | . 2 ⊢ 0R = [〈1P, 1P〉] ~R | |
| 8 | df-nr 11144 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 9 | 6, 7, 8 | 3eltr4i 2873 | 1 ⊢ 0R ∈ R |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 〈cop 4834 × cxp 5648 [cec 8718 / cqs 8719 Pcnp 10947 1Pc1p 10948 ~R cer 10952 Rcnr 10953 0Rc0r 10954 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-inf2 9645 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8302 df-wrecs 8333 df-recs 8382 df-rdg 8421 df-1o 8479 df-oadd 8483 df-omul 8484 df-er 8720 df-ec 8722 df-qs 8726 df-ni 10960 df-pli 10961 df-mi 10962 df-lti 10963 df-plpq 10996 df-mpq 10997 df-ltpq 10998 df-enq 10999 df-nq 11000 df-erq 11001 df-plq 11002 df-mq 11003 df-1nq 11004 df-rq 11005 df-ltnq 11006 df-np 11069 df-1p 11070 df-enr 11143 df-nr 11144 df-0r 11148 |
| This theorem is used by: sqgt0sr 11194 opelreal 11218 elreal 11219 elreal2 11220 eqresr 11225 addresr 11226 mulresr 11227 axresscn 11236 axicn 11238 axi2m1 11247 axcnre 11252 |
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