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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 11127 | . . . 4 ⊢ 1P ∈ P | |
| 2 | opelxpi 5692 | . . . 4 ⊢ ((1P ∈ P ∧ 1P ∈ P) → 〈1P, 1P〉 ∈ (P × P)) | |
| 3 | 1, 1, 2 | mp2an 705 | . . 3 ⊢ 〈1P, 1P〉 ∈ (P × P) |
| 4 | enrex 11179 | . . . 4 ⊢ ~R ∈ V | |
| 5 | 4 | ecelqsi 8818 | . . 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 11172 | . 2 ⊢ 0R = [〈1P, 1P〉] ~R | |
| 8 | df-nr 11168 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 9 | 6, 7, 8 | 3eltr4i 2877 | 1 ⊢ 0R ∈ R |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 〈cop 4838 × cxp 5653 [cec 8743 / cqs 8744 Pcnp 10971 1Pc1p 10972 ~R cer 10976 Rcnr 10977 0Rc0r 10978 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7775 ax-inf2 9669 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6322 df-ord 6383 df-on 6384 df-lim 6385 df-suc 6386 df-iota 6512 df-fun 6560 df-fn 6561 df-f 6562 df-f1 6563 df-fo 6564 df-f1o 6565 df-fv 6566 df-ov 7446 df-oprab 7447 df-mpo 7448 df-om 7902 df-1st 8025 df-2nd 8026 df-frecs 8327 df-wrecs 8358 df-recs 8407 df-rdg 8446 df-1o 8504 df-oadd 8508 df-omul 8509 df-er 8745 df-ec 8747 df-qs 8751 df-ni 10984 df-pli 10985 df-mi 10986 df-lti 10987 df-plpq 11020 df-mpq 11021 df-ltpq 11022 df-enq 11023 df-nq 11024 df-erq 11025 df-plq 11026 df-mq 11027 df-1nq 11028 df-rq 11029 df-ltnq 11030 df-np 11093 df-1p 11094 df-enr 11167 df-nr 11168 df-0r 11172 |
| This theorem is used by: sqgt0sr 11218 opelreal 11242 elreal 11243 elreal2 11244 eqresr 11249 addresr 11250 mulresr 11251 axresscn 11260 axicn 11262 axi2m1 11271 axcnre 11276 |
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