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| Mirrors > Home > MPE Home > Th. List > Mathboxes > sn-ltmul2d | Structured version Visualization version GIF version | ||
| Description: ltmul2d 13213 without ax-mulcom 11271. (Contributed by SN, 26-Jun-2024.) |
| Ref | Expression |
|---|---|
| sn-ltmul2d.a | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| sn-ltmul2d.b | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| sn-ltmul2d.c | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| sn-ltmul2d.1 | ⊢ (𝜑 → 0 < 𝐶) |
| Ref | Expression |
|---|---|
| sn-ltmul2d | ⊢ (𝜑 → ((𝐶 · 𝐴) < (𝐶 · 𝐵) ↔ 𝐴 < 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sn-ltmul2d.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 2 | sn-ltmul2d.b | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 3 | sn-ltmul2d.a | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 4 | rersubcl 43566 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 −ℝ 𝐴) ∈ ℝ) | |
| 5 | 2, 3, 4 | syl2anc 596 | . . . 4 ⊢ (𝜑 → (𝐵 −ℝ 𝐴) ∈ ℝ) |
| 6 | sn-ltmul2d.1 | . . . 4 ⊢ (𝜑 → 0 < 𝐶) | |
| 7 | 1, 5, 6 | mulgt0b1d 43673 | . . 3 ⊢ (𝜑 → (0 < (𝐵 −ℝ 𝐴) ↔ 0 < (𝐶 · (𝐵 −ℝ 𝐴)))) |
| 8 | resubdi 43584 | . . . . 5 ⊢ ((𝐶 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐶 · (𝐵 −ℝ 𝐴)) = ((𝐶 · 𝐵) −ℝ (𝐶 · 𝐴))) | |
| 9 | 1, 2, 3, 8 | syl3anc 1398 | . . . 4 ⊢ (𝜑 → (𝐶 · (𝐵 −ℝ 𝐴)) = ((𝐶 · 𝐵) −ℝ (𝐶 · 𝐴))) |
| 10 | 9 | breq2d 5114 | . . 3 ⊢ (𝜑 → (0 < (𝐶 · (𝐵 −ℝ 𝐴)) ↔ 0 < ((𝐶 · 𝐵) −ℝ (𝐶 · 𝐴)))) |
| 11 | 7, 10 | bitr2d 283 | . 2 ⊢ (𝜑 → (0 < ((𝐶 · 𝐵) −ℝ (𝐶 · 𝐴)) ↔ 0 < (𝐵 −ℝ 𝐴))) |
| 12 | 1, 3 | remulcld 11346 | . . 3 ⊢ (𝜑 → (𝐶 · 𝐴) ∈ ℝ) |
| 13 | 1, 2 | remulcld 11346 | . . 3 ⊢ (𝜑 → (𝐶 · 𝐵) ∈ ℝ) |
| 14 | reposdif 43656 | . . 3 ⊢ (((𝐶 · 𝐴) ∈ ℝ ∧ (𝐶 · 𝐵) ∈ ℝ) → ((𝐶 · 𝐴) < (𝐶 · 𝐵) ↔ 0 < ((𝐶 · 𝐵) −ℝ (𝐶 · 𝐴)))) | |
| 15 | 12, 13, 14 | syl2anc 596 | . 2 ⊢ (𝜑 → ((𝐶 · 𝐴) < (𝐶 · 𝐵) ↔ 0 < ((𝐶 · 𝐵) −ℝ (𝐶 · 𝐴)))) |
| 16 | reposdif 43656 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 ↔ 0 < (𝐵 −ℝ 𝐴))) | |
| 17 | 3, 2, 16 | syl2anc 596 | . 2 ⊢ (𝜑 → (𝐴 < 𝐵 ↔ 0 < (𝐵 −ℝ 𝐴))) |
| 18 | 11, 15, 17 | 3bitr4d 314 | 1 ⊢ (𝜑 → ((𝐶 · 𝐴) < (𝐶 · 𝐵) ↔ 𝐴 < 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1569 ∈ wcel 2144 class class class wbr 5102 (class class class)co 7424 ℝcr 11206 0cc0 11207 · cmul 11212 < clt 11350 −ℝ cresub 43553 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 ax-resscn 11264 ax-1cn 11265 ax-icn 11266 ax-addcl 11267 ax-addrcl 11268 ax-mulcl 11269 ax-mulrcl 11270 ax-addass 11272 ax-mulass 11273 ax-distr 11274 ax-i2m1 11275 ax-1ne0 11276 ax-1rid 11277 ax-rnegex 11278 ax-rrecex 11279 ax-cnre 11280 ax-pre-lttri 11281 ax-pre-lttrn 11282 ax-pre-ltadd 11283 ax-pre-mulgt0 11284 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7381 df-ov 7427 df-oprab 7428 df-mpo 7429 df-er 8725 df-en 8982 df-dom 8983 df-sdom 8984 df-pnf 11352 df-mnf 11353 df-ltxr 11355 df-2 12412 df-3 12413 df-resub 43554 |
| This theorem is used by: sn-ltmulgt11d 43675 |
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