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Mirrors > Home > MPE Home > Th. List > xlt0neg1 | Structured version Visualization version GIF version |
Description: Extended real version of lt0neg1 11343. (Contributed by Mario Carneiro, 20-Aug-2015.) |
Ref | Expression |
---|---|
xlt0neg1 | ⊢ (𝐴 ∈ ℝ* → (𝐴 < 0 ↔ 0 < -𝑒𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0xr 10885 | . . 3 ⊢ 0 ∈ ℝ* | |
2 | xltneg 12812 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 0 ∈ ℝ*) → (𝐴 < 0 ↔ -𝑒0 < -𝑒𝐴)) | |
3 | 1, 2 | mpan2 691 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 < 0 ↔ -𝑒0 < -𝑒𝐴)) |
4 | xneg0 12807 | . . 3 ⊢ -𝑒0 = 0 | |
5 | 4 | breq1i 5065 | . 2 ⊢ (-𝑒0 < -𝑒𝐴 ↔ 0 < -𝑒𝐴) |
6 | 3, 5 | bitrdi 290 | 1 ⊢ (𝐴 ∈ ℝ* → (𝐴 < 0 ↔ 0 < -𝑒𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∈ wcel 2110 class class class wbr 5058 0cc0 10734 ℝ*cxr 10871 < clt 10872 -𝑒cxne 12706 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-sep 5197 ax-nul 5204 ax-pow 5263 ax-pr 5327 ax-un 7528 ax-cnex 10790 ax-resscn 10791 ax-1cn 10792 ax-icn 10793 ax-addcl 10794 ax-addrcl 10795 ax-mulcl 10796 ax-mulrcl 10797 ax-mulcom 10798 ax-addass 10799 ax-mulass 10800 ax-distr 10801 ax-i2m1 10802 ax-1ne0 10803 ax-1rid 10804 ax-rnegex 10805 ax-rrecex 10806 ax-cnre 10807 ax-pre-lttri 10808 ax-pre-lttrn 10809 ax-pre-ltadd 10810 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rab 3070 df-v 3415 df-sbc 3700 df-csb 3817 df-dif 3874 df-un 3876 df-in 3878 df-ss 3888 df-nul 4243 df-if 4445 df-pw 4520 df-sn 4547 df-pr 4549 df-op 4553 df-uni 4825 df-br 5059 df-opab 5121 df-mpt 5141 df-id 5460 df-po 5473 df-so 5474 df-xp 5562 df-rel 5563 df-cnv 5564 df-co 5565 df-dm 5566 df-rn 5567 df-res 5568 df-ima 5569 df-iota 6343 df-fun 6387 df-fn 6388 df-f 6389 df-f1 6390 df-fo 6391 df-f1o 6392 df-fv 6393 df-riota 7175 df-ov 7221 df-oprab 7222 df-mpo 7223 df-er 8396 df-en 8632 df-dom 8633 df-sdom 8634 df-pnf 10874 df-mnf 10875 df-xr 10876 df-ltxr 10877 df-le 10878 df-sub 11069 df-neg 11070 df-xneg 12709 |
This theorem is referenced by: xposdif 12857 xmulneg1 12864 xmulpnf1n 12873 xmulasslem 12880 xadddi 12890 |
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