Mathbox for Steven Nguyen |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > Mathboxes > remulid2 | Structured version Visualization version GIF version |
Description: Commuted version of ax-1rid 10604 and real number version of mulid2 10637 without ax-mulcom 10598. (Contributed by SN, 5-Feb-2024.) |
Ref | Expression |
---|---|
remulid2 | ⊢ (𝐴 ∈ ℝ → (1 · 𝐴) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ne 3016 | . . 3 ⊢ (𝐴 ≠ 0 ↔ ¬ 𝐴 = 0) | |
2 | ax-rrecex 10606 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) → ∃𝑥 ∈ ℝ (𝐴 · 𝑥) = 1) | |
3 | simpll 765 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝐴 ∈ ℝ) | |
4 | 3 | recnd 10666 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝐴 ∈ ℂ) |
5 | simprl 769 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝑥 ∈ ℝ) | |
6 | 5 | recnd 10666 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → 𝑥 ∈ ℂ) |
7 | 4, 6, 4 | mulassd 10661 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → ((𝐴 · 𝑥) · 𝐴) = (𝐴 · (𝑥 · 𝐴))) |
8 | simprr 771 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · 𝑥) = 1) | |
9 | 8 | oveq1d 7168 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → ((𝐴 · 𝑥) · 𝐴) = (1 · 𝐴)) |
10 | 3, 5, 8 | remulinvcom 39323 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝑥 · 𝐴) = 1) |
11 | 10 | oveq2d 7169 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · (𝑥 · 𝐴)) = (𝐴 · 1)) |
12 | ax-1rid 10604 | . . . . . . . 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 2855 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (𝐴 · (𝑥 · 𝐴)) = 𝐴) |
15 | 7, 9, 14 | 3eqtr3d 2863 | . . . . 5 ⊢ (((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) ∧ (𝑥 ∈ ℝ ∧ (𝐴 · 𝑥) = 1)) → (1 · 𝐴) = 𝐴) |
16 | 2, 15 | rexlimddv 3290 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) → (1 · 𝐴) = 𝐴) |
17 | 16 | ex 415 | . . 3 ⊢ (𝐴 ∈ ℝ → (𝐴 ≠ 0 → (1 · 𝐴) = 𝐴)) |
18 | 1, 17 | syl5bir 245 | . 2 ⊢ (𝐴 ∈ ℝ → (¬ 𝐴 = 0 → (1 · 𝐴) = 𝐴)) |
19 | 1re 10638 | . . . 4 ⊢ 1 ∈ ℝ | |
20 | remul01 39312 | . . . 4 ⊢ (1 ∈ ℝ → (1 · 0) = 0) | |
21 | 19, 20 | mp1i 13 | . . 3 ⊢ (𝐴 = 0 → (1 · 0) = 0) |
22 | oveq2 7161 | . . 3 ⊢ (𝐴 = 0 → (1 · 𝐴) = (1 · 0)) | |
23 | id 22 | . . 3 ⊢ (𝐴 = 0 → 𝐴 = 0) | |
24 | 21, 22, 23 | 3eqtr4d 2865 | . 2 ⊢ (𝐴 = 0 → (1 · 𝐴) = 𝐴) |
25 | 18, 24 | pm2.61d2 183 | 1 ⊢ (𝐴 ∈ ℝ → (1 · 𝐴) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 398 = wceq 1536 ∈ wcel 2113 ≠ wne 3015 (class class class)co 7153 ℝcr 10533 0cc0 10534 1c1 10535 · cmul 10539 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2792 ax-sep 5200 ax-nul 5207 ax-pow 5263 ax-pr 5327 ax-un 7458 ax-resscn 10591 ax-1cn 10592 ax-icn 10593 ax-addcl 10594 ax-addrcl 10595 ax-mulcl 10596 ax-mulrcl 10597 ax-addass 10599 ax-mulass 10600 ax-distr 10601 ax-i2m1 10602 ax-1ne0 10603 ax-1rid 10604 ax-rnegex 10605 ax-rrecex 10606 ax-cnre 10607 ax-pre-lttri 10608 ax-pre-lttrn 10609 ax-pre-ltadd 10610 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1083 df-3an 1084 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2799 df-cleq 2813 df-clel 2892 df-nfc 2962 df-ne 3016 df-nel 3123 df-ral 3142 df-rex 3143 df-reu 3144 df-rmo 3145 df-rab 3146 df-v 3495 df-sbc 3771 df-csb 3881 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-nul 4289 df-if 4465 df-pw 4538 df-sn 4565 df-pr 4567 df-op 4571 df-uni 4836 df-br 5064 df-opab 5126 df-mpt 5144 df-id 5457 df-po 5471 df-so 5472 df-xp 5558 df-rel 5559 df-cnv 5560 df-co 5561 df-dm 5562 df-rn 5563 df-res 5564 df-ima 5565 df-iota 6311 df-fun 6354 df-fn 6355 df-f 6356 df-f1 6357 df-fo 6358 df-f1o 6359 df-fv 6360 df-riota 7111 df-ov 7156 df-oprab 7157 df-mpo 7158 df-er 8286 df-en 8507 df-dom 8508 df-sdom 8509 df-pnf 10674 df-mnf 10675 df-ltxr 10677 df-2 11698 df-3 11699 df-resub 39271 |
This theorem is referenced by: remulcand 39325 |
Copyright terms: Public domain | W3C validator |