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| Mirrors > Home > MPE Home > Th. List > Mathboxes > sn-ltmul2d | Structured version Visualization version GIF version | ||
| Description: ltmul2d 13206 without ax-mulcom 11264. (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 43429 | . . . . 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 43536 | . . 3 ⊢ (𝜑 → (0 < (𝐵 −ℝ 𝐴) ↔ 0 < (𝐶 · (𝐵 −ℝ 𝐴)))) |
| 8 | resubdi 43447 | . . . . 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 5115 | . . 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 11339 | . . 3 ⊢ (𝜑 → (𝐶 · 𝐴) ∈ ℝ) |
| 13 | 1, 2 | remulcld 11339 | . . 3 ⊢ (𝜑 → (𝐶 · 𝐵) ∈ ℝ) |
| 14 | reposdif 43519 | . . 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 43519 | . . 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 1570 ∈ wcel 2145 class class class wbr 5103 (class class class)co 7420 ℝcr 11199 0cc0 11200 · cmul 11205 < clt 11343 −ℝ cresub 43416 |
| 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 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 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 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 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-ltxr 11348 df-2 12405 df-3 12406 df-resub 43417 |
| This theorem is used by: sn-ltmulgt11d 43538 |
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