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| Mirrors > Home > MPE Home > Th. List > ltmulgt12d | Structured version Visualization version GIF version | ||
| Description: Multiplication by a number greater than 1. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| rpgecld.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| rpgecld.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ+) |
| Ref | Expression |
|---|---|
| ltmulgt12d | ⊢ (𝜑 → (1 < 𝐴 ↔ 𝐵 < (𝐴 · 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rpgecld.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ+) | |
| 2 | 1 | rpred 13061 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| 3 | rpgecld.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 4 | 1 | rpgt0d 13064 | . 2 ⊢ (𝜑 → 0 < 𝐵) |
| 5 | ltmulgt12 12076 | . 2 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ 0 < 𝐵) → (1 < 𝐴 ↔ 𝐵 < (𝐴 · 𝐵))) | |
| 6 | 2, 3, 4, 5 | syl3anc 1398 | 1 ⊢ (𝜑 → (1 < 𝐴 ↔ 𝐵 < (𝐴 · 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∈ wcel 2143 class class class wbr 5110 (class class class)co 7412 ℝcr 11100 0cc0 11101 1c1 11102 · cmul 11106 < clt 11244 ℝ+crp 13017 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5558 df-po 5571 df-so 5572 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 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 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-er 8695 df-en 8945 df-dom 8946 df-sdom 8947 df-pnf 11246 df-mnf 11247 df-ltxr 11249 df-sub 11444 df-neg 11445 df-rp 13018 |
| This theorem is referenced by: nnmul2 48050 |
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