| Mathbox for Steven Nguyen |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > remullid | Structured version Visualization version GIF version | ||
| Description: Commuted version of ax-1rid 11140 without ax-mulcom 11134. (Contributed by SN, 5-Feb-2024.) |
| Ref | Expression |
|---|---|
| remullid | ⊢ (𝐴 ∈ ℝ → (1 · 𝐴) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ne 2957 | . . 3 ⊢ (𝐴 ≠ 0 ↔ ¬ 𝐴 = 0) | |
| 2 | ax-rrecex 11142 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) → ∃𝑥 ∈ ℝ (𝐴 · 𝑥) = 1) | |
| 3 | simpll 776 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝐴 ∈ ℝ) | |
| 4 | 3 | recnd 11207 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝐴 ∈ ℂ) |
| 5 | simprl 780 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝑥 ∈ ℝ) | |
| 6 | 5 | recnd 11207 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝑥 ∈ ℂ) |
| 7 | 4, 6, 4 | mulassd 11202 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → ((𝐴 · 𝑥) · 𝐴) = (𝐴 · (𝑥 · 𝐴))) |
| 8 | simprr 782 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · 𝑥) = 1) | |
| 9 | 8 | oveq1d 7407 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → ((𝐴 · 𝑥) · 𝐴) = (1 · 𝐴)) |
| 10 | 3, 5, 8 | remulinvcom 43006 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝑥 · 𝐴) = 1) |
| 11 | 10 | oveq2d 7408 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · (𝑥 · 𝐴)) = (𝐴 · 1)) |
| 12 | ax-1rid 11140 | . . . . . . . 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 2796 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · (𝑥 · 𝐴)) = 𝐴) |
| 15 | 7, 9, 14 | 3eqtr3d 2804 | . . . . 5 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (1 · 𝐴) = 𝐴) |
| 16 | 2, 15 | rexlimddv 3168 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) → (1 · 𝐴) = 𝐴) |
| 17 | 16 | ex 416 | . . 3 ⊢ (𝐴 ∈ ℝ → (𝐴 ≠ 0 → (1 · 𝐴) = 𝐴)) |
| 18 | 1, 17 | biimtrrid 245 | . 2 ⊢ (𝐴 ∈ ℝ → (¬ 𝐴 = 0 → (1 · 𝐴) = 𝐴)) |
| 19 | 1re 11178 | . . . 4 ⊢ 1 ∈ ℝ | |
| 20 | remul01 42980 | . . . 4 ⊢ (1 ∈ ℝ → (1 · 0) = 0) | |
| 21 | 19, 20 | mp1i 13 | . . 3 ⊢ (𝐴 = 0 → (1 · 0) = 0) |
| 22 | oveq2 7400 | . . 3 ⊢ (𝐴 = 0 → (1 · 𝐴) = (1 · 0)) | |
| 23 | id 22 | . . 3 ⊢ (𝐴 = 0 → 𝐴 = 0) | |
| 24 | 21, 22, 23 | 3eqtr4d 2806 | . 2 ⊢ (𝐴 = 0 → (1 · 𝐴) = 𝐴) |
| 25 | 18, 24 | pm2.61d2 182 | 1 ⊢ (𝐴 ∈ ℝ → (1 · 𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 399 = wceq 1559 ∈ wcel 2141 ≠ wne 2956 (class class class)co 7392 ℝcr 11069 0cc0 11070 1c1 11071 · cmul 11075 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5245 ax-nul 5255 ax-pow 5321 ax-pr 5389 ax-un 7714 ax-resscn 11127 ax-1cn 11128 ax-icn 11129 ax-addcl 11130 ax-addrcl 11131 ax-mulcl 11132 ax-mulrcl 11133 ax-addass 11135 ax-mulass 11136 ax-distr 11137 ax-i2m1 11138 ax-1ne0 11139 ax-1rid 11140 ax-rnegex 11141 ax-rrecex 11142 ax-cnre 11143 ax-pre-lttri 11144 ax-pre-lttrn 11145 ax-pre-ltadd 11146 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-br 5100 df-opab 5162 df-mpt 5181 df-id 5540 df-po 5553 df-so 5554 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-riota 7349 df-ov 7395 df-oprab 7396 df-mpo 7397 df-er 8673 df-en 8924 df-dom 8925 df-sdom 8926 df-pnf 11215 df-mnf 11216 df-ltxr 11218 df-2 12277 df-3 12278 df-resub 42939 |
| This theorem is referenced by: sn-mullid 43009 remulcand 43012 rediveud 43016 sn-rediv1d 43025 redivrec2d 43033 sn-0tie0 43037 mullt0b1d 43069 |
| Copyright terms: Public domain | W3C validator |