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Mirrors > Home > MPE Home > Th. List > le2add | Structured version Visualization version GIF version |
Description: Adding both sides of two 'less than or equal to' relations. (Contributed by NM, 17-Apr-2005.) (Proof shortened by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
---|---|
le2add | ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → ((𝐴 ≤ 𝐶 ∧ 𝐵 ≤ 𝐷) → (𝐴 + 𝐵) ≤ (𝐶 + 𝐷))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpll 766 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → 𝐴 ∈ ℝ) | |
2 | simprl 770 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → 𝐶 ∈ ℝ) | |
3 | simplr 768 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → 𝐵 ∈ ℝ) | |
4 | leadd1 11758 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐶 ↔ (𝐴 + 𝐵) ≤ (𝐶 + 𝐵))) | |
5 | 1, 2, 3, 4 | syl3anc 1371 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → (𝐴 ≤ 𝐶 ↔ (𝐴 + 𝐵) ≤ (𝐶 + 𝐵))) |
6 | simprr 772 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → 𝐷 ∈ ℝ) | |
7 | leadd2 11759 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐷 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐵 ≤ 𝐷 ↔ (𝐶 + 𝐵) ≤ (𝐶 + 𝐷))) | |
8 | 3, 6, 2, 7 | syl3anc 1371 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → (𝐵 ≤ 𝐷 ↔ (𝐶 + 𝐵) ≤ (𝐶 + 𝐷))) |
9 | 5, 8 | anbi12d 631 | . 2 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → ((𝐴 ≤ 𝐶 ∧ 𝐵 ≤ 𝐷) ↔ ((𝐴 + 𝐵) ≤ (𝐶 + 𝐵) ∧ (𝐶 + 𝐵) ≤ (𝐶 + 𝐷)))) |
10 | 1, 3 | readdcld 11319 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → (𝐴 + 𝐵) ∈ ℝ) |
11 | 2, 3 | readdcld 11319 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → (𝐶 + 𝐵) ∈ ℝ) |
12 | 2, 6 | readdcld 11319 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → (𝐶 + 𝐷) ∈ ℝ) |
13 | letr 11384 | . . 3 ⊢ (((𝐴 + 𝐵) ∈ ℝ ∧ (𝐶 + 𝐵) ∈ ℝ ∧ (𝐶 + 𝐷) ∈ ℝ) → (((𝐴 + 𝐵) ≤ (𝐶 + 𝐵) ∧ (𝐶 + 𝐵) ≤ (𝐶 + 𝐷)) → (𝐴 + 𝐵) ≤ (𝐶 + 𝐷))) | |
14 | 10, 11, 12, 13 | syl3anc 1371 | . 2 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → (((𝐴 + 𝐵) ≤ (𝐶 + 𝐵) ∧ (𝐶 + 𝐵) ≤ (𝐶 + 𝐷)) → (𝐴 + 𝐵) ≤ (𝐶 + 𝐷))) |
15 | 9, 14 | sylbid 240 | 1 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) → ((𝐴 ≤ 𝐶 ∧ 𝐵 ≤ 𝐷) → (𝐴 + 𝐵) ≤ (𝐶 + 𝐷))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2108 class class class wbr 5166 (class class class)co 7448 ℝcr 11183 + caddc 11187 ≤ cle 11325 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-resscn 11241 ax-1cn 11242 ax-icn 11243 ax-addcl 11244 ax-addrcl 11245 ax-mulcl 11246 ax-mulrcl 11247 ax-mulcom 11248 ax-addass 11249 ax-mulass 11250 ax-distr 11251 ax-i2m1 11252 ax-1ne0 11253 ax-1rid 11254 ax-rnegex 11255 ax-rrecex 11256 ax-cnre 11257 ax-pre-lttri 11258 ax-pre-lttrn 11259 ax-pre-ltadd 11260 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-br 5167 df-opab 5229 df-mpt 5250 df-id 5593 df-po 5607 df-so 5608 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-ov 7451 df-er 8763 df-en 9004 df-dom 9005 df-sdom 9006 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 |
This theorem is referenced by: addge0 11779 le2addi 11853 le2addd 11909 fzadd2 13619 swrdccatin2 14777 cshwcsh2id 14877 01sqrexlem7 15297 lo1add 15673 climcndslem1 15897 climcndslem2 15898 mdegmullem 26137 mumullem2 27241 pntrsumbnd2 27629 pntlemf 27667 crctcshwlkn0 29854 ubthlem2 30903 nmoptrii 32126 cdj3i 32473 itg2addnc 37634 jm2.26lem3 42958 gbegt5 47635 gbowgt5 47636 gboge9 47638 |
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