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Mirrors > Home > MPE Home > Th. List > lenegcon2d | Structured version Visualization version GIF version |
Description: Contraposition of negative in 'less than or equal to'. (Contributed by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
---|---|
leidd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
ltnegd.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
lenegcon2d.3 | ⊢ (𝜑 → 𝐴 ≤ -𝐵) |
Ref | Expression |
---|---|
lenegcon2d | ⊢ (𝜑 → 𝐵 ≤ -𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lenegcon2d.3 | . 2 ⊢ (𝜑 → 𝐴 ≤ -𝐵) | |
2 | leidd.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
3 | ltnegd.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
4 | lenegcon2 11586 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ -𝐵 ↔ 𝐵 ≤ -𝐴)) | |
5 | 2, 3, 4 | syl2anc 585 | . 2 ⊢ (𝜑 → (𝐴 ≤ -𝐵 ↔ 𝐵 ≤ -𝐴)) |
6 | 1, 5 | mpbid 231 | 1 ⊢ (𝜑 → 𝐵 ≤ -𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∈ wcel 2106 class class class wbr 5097 ℝcr 10976 ≤ cle 11116 -cneg 11312 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2708 ax-sep 5248 ax-nul 5255 ax-pow 5313 ax-pr 5377 ax-un 7655 ax-resscn 11034 ax-1cn 11035 ax-icn 11036 ax-addcl 11037 ax-addrcl 11038 ax-mulcl 11039 ax-mulrcl 11040 ax-mulcom 11041 ax-addass 11042 ax-mulass 11043 ax-distr 11044 ax-i2m1 11045 ax-1ne0 11046 ax-1rid 11047 ax-rnegex 11048 ax-rrecex 11049 ax-cnre 11050 ax-pre-lttri 11051 ax-pre-lttrn 11052 ax-pre-ltadd 11053 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2815 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3351 df-rab 3405 df-v 3444 df-sbc 3732 df-csb 3848 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4275 df-if 4479 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4858 df-br 5098 df-opab 5160 df-mpt 5181 df-id 5523 df-po 5537 df-so 5538 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6436 df-fun 6486 df-fn 6487 df-f 6488 df-f1 6489 df-fo 6490 df-f1o 6491 df-fv 6492 df-riota 7298 df-ov 7345 df-oprab 7346 df-mpo 7347 df-er 8574 df-en 8810 df-dom 8811 df-sdom 8812 df-pnf 11117 df-mnf 11118 df-xr 11119 df-ltxr 11120 df-le 11121 df-sub 11313 df-neg 11314 |
This theorem is referenced by: zsupss 12783 plyeq0lem 25477 ftc1anclem5 36008 |
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