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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 11081 | . . . 4 ⊢ 1P ∈ P | |
| 2 | opelxpi 5688 | . . . 4 ⊢ ((1P ∈ P ∧ 1P ∈ P) → 〈1P, 1P〉 ∈ (P × P)) | |
| 3 | 1, 1, 2 | mp2an 705 | . . 3 ⊢ 〈1P, 1P〉 ∈ (P × P) |
| 4 | enrex 11133 | . . . 4 ⊢ ~R ∈ V | |
| 5 | 4 | ecelqsi 8774 | . . 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 11126 | . 2 ⊢ 0R = [〈1P, 1P〉] ~R | |
| 8 | df-nr 11122 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 9 | 6, 7, 8 | 3eltr4i 2874 | 1 ⊢ 0R ∈ R |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 〈cop 4590 × cxp 5649 [cec 8699 / cqs 8700 Pcnp 10925 1Pc1p 10926 ~R cer 10930 Rcnr 10931 0Rc0r 10932 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-inf2 9626 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-1st 7990 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8460 df-oadd 8464 df-omul 8465 df-er 8701 df-ec 8703 df-qs 8707 df-ni 10938 df-pli 10939 df-mi 10940 df-lti 10941 df-plpq 10974 df-mpq 10975 df-ltpq 10976 df-enq 10977 df-nq 10978 df-erq 10979 df-plq 10980 df-mq 10981 df-1nq 10982 df-rq 10983 df-ltnq 10984 df-np 11047 df-1p 11048 df-enr 11121 df-nr 11122 df-0r 11126 |
| This theorem is used by: sqgt0sr 11172 opelreal 11196 elreal 11197 elreal2 11198 eqresr 11203 addresr 11204 mulresr 11205 axresscn 11214 axicn 11216 axi2m1 11225 axcnre 11230 |
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