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| Mirrors > Home > MPE Home > Th. List > lesub3d | Structured version Visualization version GIF version | ||
| Description: The result of subtracting a number less than or equal to an intermediate number from a number greater than or equal to a third number increased by the intermediate number is greater than or equal to the third number. (Contributed by AV, 13-Aug-2020.) |
| Ref | Expression |
|---|---|
| leidd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| ltnegd.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| ltadd1d.3 | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| lesub3d.x | ⊢ (𝜑 → 𝑋 ∈ ℝ) |
| lesub3d.g | ⊢ (𝜑 → (𝑋 + 𝐶) ≤ 𝐴) |
| lesub3d.l | ⊢ (𝜑 → 𝐵 ≤ 𝑋) |
| Ref | Expression |
|---|---|
| lesub3d | ⊢ (𝜑 → 𝐶 ≤ (𝐴 − 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltadd1d.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 2 | ltnegd.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 3 | 1, 2 | readdcld 11174 | . . 3 ⊢ (𝜑 → (𝐶 + 𝐵) ∈ ℝ) |
| 4 | lesub3d.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ ℝ) | |
| 5 | 4, 1 | readdcld 11174 | . . 3 ⊢ (𝜑 → (𝑋 + 𝐶) ∈ ℝ) |
| 6 | leidd.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 7 | 1 | recnd 11173 | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| 8 | 2 | recnd 11173 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 9 | 7, 8 | addcomd 11348 | . . . 4 ⊢ (𝜑 → (𝐶 + 𝐵) = (𝐵 + 𝐶)) |
| 10 | lesub3d.l | . . . . 5 ⊢ (𝜑 → 𝐵 ≤ 𝑋) | |
| 11 | 2, 4, 1, 10 | leadd1dd 11764 | . . . 4 ⊢ (𝜑 → (𝐵 + 𝐶) ≤ (𝑋 + 𝐶)) |
| 12 | 9, 11 | eqbrtrd 5107 | . . 3 ⊢ (𝜑 → (𝐶 + 𝐵) ≤ (𝑋 + 𝐶)) |
| 13 | lesub3d.g | . . 3 ⊢ (𝜑 → (𝑋 + 𝐶) ≤ 𝐴) | |
| 14 | 3, 5, 6, 12, 13 | letrd 11303 | . 2 ⊢ (𝜑 → (𝐶 + 𝐵) ≤ 𝐴) |
| 15 | leaddsub 11626 | . . 3 ⊢ ((𝐶 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → ((𝐶 + 𝐵) ≤ 𝐴 ↔ 𝐶 ≤ (𝐴 − 𝐵))) | |
| 16 | 1, 2, 6, 15 | syl3anc 1374 | . 2 ⊢ (𝜑 → ((𝐶 + 𝐵) ≤ 𝐴 ↔ 𝐶 ≤ (𝐴 − 𝐵))) |
| 17 | 14, 16 | mpbid 232 | 1 ⊢ (𝜑 → 𝐶 ≤ (𝐴 − 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∈ wcel 2114 class class class wbr 5085 (class class class)co 7367 ℝcr 11037 + caddc 11041 ≤ cle 11180 − cmin 11377 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-po 5539 df-so 5540 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 |
| This theorem is referenced by: prmgaplem8 17029 bcmono 27240 fltnlta 43096 |
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