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Mirrors > Home > ILE Home > Th. List > xlt0neg1 | GIF version |
Description: Extended real version of lt0neg1 8454. (Contributed by Mario Carneiro, 20-Aug-2015.) |
Ref | Expression |
---|---|
xlt0neg1 | ⊢ (𝐴 ∈ ℝ* → (𝐴 < 0 ↔ 0 < -𝑒𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0xr 8033 | . . 3 ⊢ 0 ∈ ℝ* | |
2 | xltneg 9865 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 0 ∈ ℝ*) → (𝐴 < 0 ↔ -𝑒0 < -𝑒𝐴)) | |
3 | 1, 2 | mpan2 425 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 < 0 ↔ -𝑒0 < -𝑒𝐴)) |
4 | xneg0 9860 | . . 3 ⊢ -𝑒0 = 0 | |
5 | 4 | breq1i 4025 | . 2 ⊢ (-𝑒0 < -𝑒𝐴 ↔ 0 < -𝑒𝐴) |
6 | 3, 5 | bitrdi 196 | 1 ⊢ (𝐴 ∈ ℝ* → (𝐴 < 0 ↔ 0 < -𝑒𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 105 ∈ wcel 2160 class class class wbr 4018 0cc0 7840 ℝ*cxr 8020 < clt 8021 -𝑒cxne 9798 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2162 ax-14 2163 ax-ext 2171 ax-sep 4136 ax-pow 4192 ax-pr 4227 ax-un 4451 ax-setind 4554 ax-cnex 7931 ax-resscn 7932 ax-1cn 7933 ax-1re 7934 ax-icn 7935 ax-addcl 7936 ax-addrcl 7937 ax-mulcl 7938 ax-addcom 7940 ax-addass 7942 ax-distr 7944 ax-i2m1 7945 ax-0id 7948 ax-rnegex 7949 ax-cnre 7951 ax-pre-ltadd 7956 |
This theorem depends on definitions: df-bi 117 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ne 2361 df-nel 2456 df-ral 2473 df-rex 2474 df-reu 2475 df-rab 2477 df-v 2754 df-sbc 2978 df-dif 3146 df-un 3148 df-in 3150 df-ss 3157 df-if 3550 df-pw 3592 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-br 4019 df-opab 4080 df-id 4311 df-xp 4650 df-rel 4651 df-cnv 4652 df-co 4653 df-dm 4654 df-iota 5196 df-fun 5237 df-fv 5243 df-riota 5851 df-ov 5898 df-oprab 5899 df-mpo 5900 df-pnf 8023 df-mnf 8024 df-xr 8025 df-ltxr 8026 df-sub 8159 df-neg 8160 df-xneg 9801 |
This theorem is referenced by: (None) |
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