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Mirrors > Home > ILE Home > Th. List > 0reALT | GIF version |
Description: Alternate proof of 0re 7872. (Contributed by NM, 19-Feb-2005.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
0reALT | ⊢ 0 ∈ ℝ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn 7819 | . . 3 ⊢ 1 ∈ ℂ | |
2 | 1 | subidi 8140 | . 2 ⊢ (1 − 1) = 0 |
3 | 1re 7871 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 3, 3 | resubcli 8132 | . 2 ⊢ (1 − 1) ∈ ℝ |
5 | 2, 4 | eqeltrri 2231 | 1 ⊢ 0 ∈ ℝ |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 2128 (class class class)co 5821 ℝcr 7725 0cc0 7726 1c1 7727 − cmin 8040 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-14 2131 ax-ext 2139 ax-sep 4082 ax-pow 4135 ax-pr 4169 ax-setind 4495 ax-resscn 7818 ax-1cn 7819 ax-1re 7820 ax-icn 7821 ax-addcl 7822 ax-addrcl 7823 ax-mulcl 7824 ax-addcom 7826 ax-addass 7828 ax-distr 7830 ax-i2m1 7831 ax-0id 7834 ax-rnegex 7835 ax-cnre 7837 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-ral 2440 df-rex 2441 df-reu 2442 df-rab 2444 df-v 2714 df-sbc 2938 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3773 df-br 3966 df-opab 4026 df-id 4253 df-xp 4591 df-rel 4592 df-cnv 4593 df-co 4594 df-dm 4595 df-iota 5134 df-fun 5171 df-fv 5177 df-riota 5777 df-ov 5824 df-oprab 5825 df-mpo 5826 df-sub 8042 df-neg 8043 |
This theorem is referenced by: (None) |
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