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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 11028 | . . . 4 ⊢ 1P ∈ P | |
| 2 | opelxpi 5696 | . . . 4 ⊢ ((1P ∈ P ∧ 1P ∈ P) → 〈1P, 1P〉 ∈ (P × P)) | |
| 3 | 1, 1, 2 | mp2an 705 | . . 3 ⊢ 〈1P, 1P〉 ∈ (P × P) |
| 4 | enrex 11080 | . . . 4 ⊢ ~R ∈ V | |
| 5 | 4 | ecelqsi 8773 | . . 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 11073 | . 2 ⊢ 0R = [〈1P, 1P〉] ~R | |
| 8 | df-nr 11069 | . 2 ⊢ R = ((P × P) / ~R ) | |
| 9 | 6, 7, 8 | 3eltr4i 2875 | 1 ⊢ 0R ∈ R |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 〈cop 4593 × cxp 5657 [cec 8698 / cqs 8699 Pcnp 10872 1Pc1p 10873 ~R cer 10877 Rcnr 10878 0Rc0r 10879 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-inf2 9624 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-int 4911 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7420 df-oprab 7421 df-mpo 7422 df-om 7867 df-1st 7990 df-2nd 7991 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-1o 8459 df-oadd 8463 df-omul 8464 df-er 8700 df-ec 8702 df-qs 8706 df-ni 10885 df-pli 10886 df-mi 10887 df-lti 10888 df-plpq 10921 df-mpq 10922 df-ltpq 10923 df-enq 10924 df-nq 10925 df-erq 10926 df-plq 10927 df-mq 10928 df-1nq 10929 df-rq 10930 df-ltnq 10931 df-np 10994 df-1p 10995 df-enr 11068 df-nr 11069 df-0r 11073 |
| This theorem is used by: sqgt0sr 11119 opelreal 11143 elreal 11144 elreal2 11145 eqresr 11150 addresr 11151 mulresr 11152 axresscn 11161 axicn 11163 axi2m1 11172 axcnre 11177 |
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