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| Mirrors > Home > MPE Home > Th. List > Mathboxes > remullid | Structured version Visualization version GIF version | ||
| Description: Commuted version of ax-1rid 11099 without ax-mulcom 11093. (Contributed by SN, 5-Feb-2024.) |
| Ref | Expression |
|---|---|
| remullid | ⊢ (𝐴 ∈ ℝ → (1 · 𝐴) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ne 2934 | . . 3 ⊢ (𝐴 ≠ 0 ↔ ¬ 𝐴 = 0) | |
| 2 | ax-rrecex 11101 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) → ∃𝑥 ∈ ℝ (𝐴 · 𝑥) = 1) | |
| 3 | simpll 767 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝐴 ∈ ℝ) | |
| 4 | 3 | recnd 11164 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝐴 ∈ ℂ) |
| 5 | simprl 771 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝑥 ∈ ℝ) | |
| 6 | 5 | recnd 11164 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝑥 ∈ ℂ) |
| 7 | 4, 6, 4 | mulassd 11159 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → ((𝐴 · 𝑥) · 𝐴) = (𝐴 · (𝑥 · 𝐴))) |
| 8 | simprr 773 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · 𝑥) = 1) | |
| 9 | 8 | oveq1d 7375 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → ((𝐴 · 𝑥) · 𝐴) = (1 · 𝐴)) |
| 10 | 3, 5, 8 | remulinvcom 42879 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝑥 · 𝐴) = 1) |
| 11 | 10 | oveq2d 7376 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · (𝑥 · 𝐴)) = (𝐴 · 1)) |
| 12 | ax-1rid 11099 | . . . . . . . 8 ⊢ (𝐴 ∈ ℝ → (𝐴 · 1) = 𝐴) | |
| 13 | 3, 12 | syl 17 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · 1) = 𝐴) |
| 14 | 11, 13 | eqtrd 2772 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · (𝑥 · 𝐴)) = 𝐴) |
| 15 | 7, 9, 14 | 3eqtr3d 2780 | . . . . 5 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (1 · 𝐴) = 𝐴) |
| 16 | 2, 15 | rexlimddv 3145 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) → (1 · 𝐴) = 𝐴) |
| 17 | 16 | ex 412 | . . 3 ⊢ (𝐴 ∈ ℝ → (𝐴 ≠ 0 → (1 · 𝐴) = 𝐴)) |
| 18 | 1, 17 | biimtrrid 243 | . 2 ⊢ (𝐴 ∈ ℝ → (¬ 𝐴 = 0 → (1 · 𝐴) = 𝐴)) |
| 19 | 1re 11135 | . . . 4 ⊢ 1 ∈ ℝ | |
| 20 | remul01 42853 | . . . 4 ⊢ (1 ∈ ℝ → (1 · 0) = 0) | |
| 21 | 19, 20 | mp1i 13 | . . 3 ⊢ (𝐴 = 0 → (1 · 0) = 0) |
| 22 | oveq2 7368 | . . 3 ⊢ (𝐴 = 0 → (1 · 𝐴) = (1 · 0)) | |
| 23 | id 22 | . . 3 ⊢ (𝐴 = 0 → 𝐴 = 0) | |
| 24 | 21, 22, 23 | 3eqtr4d 2782 | . 2 ⊢ (𝐴 = 0 → (1 · 𝐴) = 𝐴) |
| 25 | 18, 24 | pm2.61d2 181 | 1 ⊢ (𝐴 ∈ ℝ → (1 · 𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 (class class class)co 7360 ℝcr 11028 0cc0 11029 1c1 11030 · cmul 11034 |
| 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 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-po 5532 df-so 5533 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-ltxr 11175 df-2 12235 df-3 12236 df-resub 42812 |
| This theorem is referenced by: sn-mullid 42882 remulcand 42885 rediveud 42889 sn-rediv1d 42898 redivrec2d 42906 sn-0tie0 42910 mullt0b1d 42942 |
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