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| Mirrors > Home > MPE Home > Th. List > leneg | Structured version Visualization version GIF version | ||
| Description: Negative of both sides of 'less than or equal to'. (Contributed by NM, 12-Sep-1999.) (Proof shortened by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| leneg | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ -𝐵 ≤ -𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 11237 | . . 3 ⊢ 0 ∈ ℝ | |
| 2 | lesub2 11736 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 0 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ (0 − 𝐵) ≤ (0 − 𝐴))) | |
| 3 | 1, 2 | mp3an3 1479 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ (0 − 𝐵) ≤ (0 − 𝐴))) |
| 4 | df-neg 11471 | . . 3 ⊢ -𝐵 = (0 − 𝐵) | |
| 5 | df-neg 11471 | . . 3 ⊢ -𝐴 = (0 − 𝐴) | |
| 6 | 4, 5 | breq12i 5112 | . 2 ⊢ (-𝐵 ≤ -𝐴 ↔ (0 − 𝐵) ≤ (0 − 𝐴)) |
| 7 | 3, 6 | bitr4di 292 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ -𝐵 ≤ -𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∈ wcel 2145 class class class wbr 5103 (class class class)co 7414 ℝcr 11126 0cc0 11127 ≤ cle 11271 − cmin 11468 -cneg 11469 |
| 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 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-po 5563 df-so 5564 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-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 |
| This theorem is used by: lenegcon1 11745 lenegcon2 11746 le0neg1 11749 le0neg2 11750 leord2 11771 lenegi 11786 lenegd 11820 infm3 12201 uzneg 12910 zmax 12997 rebtwnz 12999 iccneg 13528 aaliou3lem2 26582 logreclem 27002 atanlogsublem 27155 emcllem7 27241 oexpled 33309 cos9thpiminplylem1 34295 ltflcei 38365 smfinflem 47648 |
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